1. I Can't Help It That I'm Popular

The best way to insult others is by complimenting yourself. Why call other people names when you can just remind them of how awesome you are? This is one of the Mean Girls' insults that you can use the next time you're feeling harassed. The only reason why people are picking on you is because they're jealous. It's as simple as that.

2. You Think You're Really Pretty?

It's hard to forget this iconic scene from Mean Girls. Tell someone that you think they're pretty, and when they accept the compliment, ask them if they agree. It puts them on the spot, and makes them feel uncomfortable. If you aspire to be a villain like Regina, this is the perfect technique to use.

3. You Smell like a Baby Prostitute

Not all of your insults have to make complete sense. Throw together whatever random words you can come up with, and voila! It's good enough to make someone squirm. Hey, it worked for Janis.

4. You're like, in Love with Me

Never blame yourself, even when you're acting completely ridiculous and know that you're the one at fault. Always blame the other person, and throw nonsensical accusations at them. It will make you lose all of your friends, but at least you'll still have a big head. That's what's really important in the end, isn't it?

5. Her Hair is Full of Secrets

Here's an insult that you don't hear every day. It doesn't make much sense, but it's so silly that it's clever. If you know that someone is keeping secrets from you, then use this line on them, even if their hair isn't overly large. If nothing else, it'll at least get them thinking.

6. You're Fat, Because I Hate You

We all know it's wrong to pick on someone for their weight, but the theory behind this insult is worth paying attention to. Act like you're the best person around, and that you're the reason why others act the way that they do. You know in your heart that it's far from the truth, but hey, it'll give you some extra confidence, so what's the harm?

7. Actually, Everyone Hates You

You all know that one person who thinks that the world revolves around them, and that they can do no wrong. They assume that everyone is crazy about them, when in reality, everyone just wants to be far, far away from them. Bring them back down to reality with this quote, and watch their ego deflate.

Although being a mean girl looks like fun, don't forget about the ending of the movie. Being rude doesn't get you far, so only use these insults when you're joking around with your friends, unless you want to end up beneath a bus. What's your favorite line from the film that wasn't mentioned on this list?