Ever heard someone called a “rat” and wondered what’s really behind that word? A rat, in slang, is someone who betrays a group—usually by spilling secrets or informing the authorities. People often see a rat as a snitch, especially in gangs, prisons, or tight-knit groups where trust actually matters.

The slang “rat” isn’t just about the animal. It also describes someone who ditches others when things get rough, or acts like a liar or double-crosser.
If you catch this word in a conversation or a movie, it’s usually about someone betraying trust. That’s the gist, honestly.
You’ll run into other words with a similar vibe, like snitch or stool pigeon. They all circle around the same idea—someone who exposes secrets or betrays people.
If you’re curious, you can find more about how “rat” picked up this meaning over on Reddit.
What Is the Slang for Rat?

When someone calls you a “rat,” they’re saying you betrayed trust or told on someone. Sometimes, people toss the word around in a joking way with friends.
The history and related slang make it clear why “rat” can sound harsh, or sometimes just playful.
Main Meanings in Slang
In slang, a rat is usually a snitch or informer. That’s someone who gives up secrets or tells authority figures—like police or teachers.
People use “rat” for someone they see as untrustworthy or disloyal. It’s about breaking that unspoken rule not to betray your friends or your group.
But hey, sometimes friends use “rat” in a teasing way. If your buddy blurts out a secret, you might laugh and say, “You’re such a rat!” It’s not always mean—sometimes it’s just a jab.
Origins and History
Why do people call traitors “rats”? Well, actual rats sneak around and cause trouble, right? That sneaky vibe stuck, and “rat” started to mean a betrayer.
Movies and street talk ran with it. Over time, “rat” became a go-to insult for someone who can’t stay loyal.
It’s been around for ages, honestly. The word still pops up because it nails that feeling of someone stabbing you in the back.
Associated Slang Terms
You’ll hear other words that go hand-in-hand with “rat.” Here are a few:
- Snitch: Someone who gives up secrets or reports people.
- Informer/Informant: A bit more formal, but still about telling on others. Crime stories love these words.
- Love rat: That’s for someone who cheats and betrays a partner’s trust.
Other phrases? “Rat energy” means someone’s acting sneaky. “Ratting out” is just spilling secrets.
Knowing these words helps you catch the mood—sometimes it’s harsh, sometimes it’s just a joke.
If you want a deep dive, there’s a detailed guide on rat slang meaning.
How ‘Rat’ Is Used in Pop Culture and Online

You’ll spot “rat” all over pop culture and online chats. People use it to call someone out for “ratting out” others, or just for being untrustworthy.
It shows up in memes and slang, so knowing the meaning can save you from awkward moments.
Examples in Conversations
If someone says a person “ratted” on someone, they mean that person told on them or snitched. Like, in a group chat, someone might warn, “Don’t be a rat, keep quiet about what happened.”
TV shows use it too. In the Twilight series, fans sometimes call a character a “rat” when they act sneaky or betray others.
In real life? If your friend spills your secret, you might call them a “rat” because you’re annoyed.
Online, you’ll see words like “ratting” or “ratmug.” These usually mean tattling or betraying, but with a bit of humor.
Variations and Memes
“Rat” slang has spun off into all sorts of memes. You’ll see pictures of rats with captions about “ratting out” friends, or the word “ratmug”—kind of a mashup that means someone’s got a sneaky face.
Some memes use rats to poke fun at people who can’t keep secrets or who “roll” on others. It’s a bit like calling someone a “rolling stone,” but for gossip.
Social media spreads these terms fast. New slang and memes about rats pop up all the time, mixing humor with the idea of being a little shady.
Etiquette for Using ‘Rat’ Slang
People can get pretty sensitive when they hear the word “rat.” If you call someone a rat, you’re basically accusing them of betrayal—and that stings.
In a group or online chat, tossing out “rat” without good reason might start an argument or really upset someone. It’s best to use that word only if someone actually went behind another’s back or spilled something important.
Check your surroundings before you say it. In prison slang, “rat” isn’t just rude—it’s a big deal. Among friends, though, sometimes it’s just a dumb joke, maybe a bit of teasing.
Honestly, if you’re not sure, it’s probably smarter to skip calling anyone a “rat.” Why risk the drama?