Creepy lingo

You’ve said these (not so) innocent phrases your whole life: Learn more!

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We toss out phrases like "bite the bullet" or "caught red-handed" without giving them a second thought. But some of our favorite everyday expressions began on battlefields, in prisons, and even on plague-ridden streets. Behind those cheerful turns of phrase are stories that range from weird to downright disturbing. Don’t worry, we’ll keep it light, but you might never hear these sayings the same way again.

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Before it described devoted fans or stubborn folks, "diehard" referred to soldiers who fought until their last breath. The term first appeared in the late 1700s to describe troops who refused to surrender. Today, it has lost its blood-and-battlefield meaning and simply signifies loyalty or persistence. So if you’re a diehard sports fan, you can safely keep your devotion on the couch instead of the battlefield.

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A rumor once claimed that "rule of thumb" came from an old law allowing men to beat their wives with sticks no wider than a thumb. That’s not true. The phrase actually originates from carpenters and brewers, who used their thumbs to make rough measurements before rulers were common. Over time, it picked up that false association, but its real roots are much less sinister and far more practical.

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These days, if someone is "pulling your leg," they’re joking around. But the phrase likely originated in 19th-century London, where thieves would trip their victims by tugging on their legs before robbing them. It wasn’t exactly harmless fun back then. Over time, the expression lost its sinister connotation and became something much friendlier: a playful way to tease without causing real harm.

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This phrase has one of the darkest origins on this list. In the early 1800s, enslaved people in the United States were sometimes sold "down the river" to plantations in the Deep South, where conditions were far harsher. It came to mean betrayal or being deceived, though given its painful history, it’s often considered best avoided today. There are plenty of ways to describe someone letting you down without echoing that dark past.

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In the old days, sailors being inspected had to line up perfectly, with their toes touching a marked plank on the deck. Failure to "toe the line" could result in punishment or extra duties. The phrase later took on a figurative meaning: staying within rules or meeting expectations. Today, it’s more about following office policy than avoiding a sailor’s scolding.

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For centuries, "hysteria" was wrongly attributed to the female body, particularly the uterus (from the Greek word hystera). Doctors once used this diagnosis for nearly any symptom in women, from sadness to laughter. By the 19th century, people began to understand that emotions were not tied to specific organs. Today, "hysterical" usually means someone is laughing uncontrollably or reacting with intense emotion, not suffering from an outdated medical myth.

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In the early 1900s, saloons would literally throw out freeloaders who came for the free lunch but didn’t buy a drink, rushing them to the door—a practice known as the "bum’s rush." Later, the phrase evolved into "bum rush," meaning to forcefully push in or overwhelm. These days, we might say a crowd "bum-rushed" the stage at a concert, but thankfully, no one is being tossed into the street.

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Centuries ago, when city streets were filthy and drainage was poor, heavy rain would sweep debris into the gutters—sometimes even animal carcasses. It’s believed that this grim sight inspired the phrase "raining cats and dogs." The image stuck, though thankfully the meaning softened over time. Today, it simply means it’s pouring outside, not that the sky is literally falling.

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Being "caught red-handed" originally referred to criminals literally found with blood on their hands after committing a violent act. The phrase first appeared in Scottish law in the 15th century. Over time, it took on a lighter meaning (thank God!), used for any kind of wrongdoing, big or small.

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Before anesthesia, soldiers in pain were given something hard to bite on during surgery. Guess what? A bullet. It was a way to endure unbearable pain in silence. These days, "biting the bullet" just means bracing yourself for something unpleasant, like paying your taxes or opening a stack of bills. The modern version is much easier on the teeth.

The truth about your brain

You won’t believe what happens in your brain while you sleep

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Your brain is one of the most powerful and mysterious organs in your body. It controls everything from your thoughts to your emotions and even processes information at lightning speed. But how much do you really know about it? Some long-believed myths about the brain have been debunked, while other surprising facts reveal just how incredible this organ truly is. Get ready to be amazed by these fascinating brain facts!

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You’ve probably heard this one before, but it’s completely false! While it’s true that not all parts of the brain fire at the same time, imaging studies show that most regions are active throughout the day, even when we sleep.

Your brain is constantly working, controlling bodily functions and emotions, and processing information. So next time someone says you’re only using 10% of your brain, you can confidently tell them that’s just a myth!

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Here’s a weird fact: While your brain processes pain signals from the rest of your body, it has no pain receptors of its own. This is why surgeons can perform brain surgery on conscious patients without causing them pain.

However, the membranes and tissues surrounding the brain do have pain receptors, which is why headaches and brain injuries can be so excruciating.

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How come we have headaches if the brain has no pain receptors? Well, that’s because headaches are triggered by chemical activity in the brain, changes in nerves and blood vessels, and even fluctuating serotonin levels.

In some cases, hormones like estrogen can also play a role, which explains why migraines are more common in women.

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Dreams are proof that your brain never rests! (Warning: this fact can make you feel exhausted.) While you sleep, your limbic system, that is, the part of the brain that deals with emotions, becomes especially active, which is why dreams often feel so intense.

On average, humans experience four to seven dreams per night, even if we don’t always remember them. And what about that scary nightmare about falling? Well, you can thank your amygdala, the brain’s fear center, for that one.

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Have you ever walked into a room and instantly forgotten what you were after? That’s because short-term memory only lasts about 20-30 seconds! That’s not enough!

Your brain holds a limited amount of information in its active state before deciding whether to store it or discard it. Ironically, we can’t really choose what makes the cut, but we do hope these facts stay with you!

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That sharp, icy pain when you eat something too cold? It’s your brain’s way of telling you to slow down! Officially called sphenopalatine ganglioneuralgia, a brain freeze happens when cold food or drinks rapidly chill the blood vessels in your throat, causing them to constrict and then rapidly expand. This sends pain signals to your brain, warning you of the sudden temperature shift. It’s annoying, but it’s actually your body trying to protect itself!

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You didn’t need us to tell you, but let’s look at the details: The average person has between 12,000 and 60,000 thoughts per day. What’s even more interesting? 95% of those thoughts are the same ones you had yesterday. Is that not surprising enough? Hear this out: 80% of them tend to be negative. That’s because our brains are wired for survival, constantly analyzing risks and potential dangers.

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Even though it only makes up about 2% of your body weight, your brain employs a major quantity of energy! It consumes 20% of your oxygen and blood supply, making it one of the most demanding organs in your body.

If your brain goes without oxygen for just five minutes, brain cells start dying, leading to irreversible damage. This is why deep breathing and cardiovascular exercise are great for brain health!

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Do you know that feeling when you hit the back of your head and see stars? That’s because your occipital lobe, which controls vision, is located at the back of your brain. If you get hit there, your brain momentarily misfires, causing flashes of light.

Interestingly, your brain processes vision on the opposite side; while your right brain controls your left eye, your left brain controls your right eye. It’s one of the many ways the brain operates in a complex way.

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Believe it or not, your brain generates between 12 and 25 watts of electricity when you’re awake. If you can’t really grasp how powerful that is, check this out: It’s enough to power a small light bulb! Your brain’s electrical activity is what allows neurons to send signals at speeds of up to 260 miles per hour.

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Your brain may be the fattiest organ in your body, consisting of at least 60% fat! This is why consuming healthy fats, like omega-3s and omega-6s present in fish, for example, is essential for brain health.

Healthy fats stabilize brain cell walls, reduce inflammation, and support cognitive function. So go ahead and enjoy that avocado toast, it’s food for your brain!

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It’s not just your memory that fades over time; the brain itself physically shrinks as one gets older. It continues developing until your late 40s, but after that, it slowly decreases in size.

Now, size doesn’t equal intelligence, so a smaller brain doesn’t necessarily mean a less capable one. Staying mentally active, exercising, and eating brain-boosting foods can help keep it in top shape!

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We often think of cholesterol as bad, but your brain actually depends on it! In fact, 25% of your body’s cholesterol is stored in your brain, where it helps with learning and memory. However, unlike other organs, the brain can’t absorb cholesterol from the blood, it has to produce its own. So, while too much cholesterol in the body can be harmful, the right amount is vital for brain function. At least you can use that as an excuse to get that burger!