you're having a laugh

Making a big joke, so in that case, you're having a laugh..

Friend 1: I think I can defeat the high schoolers today!
Friend 2: HAHA, YOU'RE HAVING A LAUGH MATE!

But you're the one calling

"But you're the one calling" Is a translation from a polish version of "who asked" or just straight up telling someone that they're bragging about an irrelevant topic or just another way of saying "who asked?"

Your girlfriend slept with 3 guys before you!

Unless she does when I'm in a relationship ship with her I don't mind.

I was one of them.

But you're the one calling.

sir you're flying

When you come across someone who is just floating or flying for no apparent reason

Um, sir you're flying

You're mad cunt

Its basically a aussie slang which means "you're crazy"

"Oh my god you're mad cunt for doing that"

"Your mad bro"

like you're hit

An illiterate term used by ghetto people who frequent jail, meaning you're less than they are but in reality they are less than you.

I'm classy, intelligent, beautiful and Independant and like you're hit.

When you're on a horse

A phrase often repeated a significant amount of times to the point where it becomes an annoyance and no one really values their company or even their existence. The phrase relates to a certain situation, however leads to nothing, almost a cliffhanger to what is implied when your on a horse.

Luke: When you're on a horse

*proceeds to shit uncontrollably"

You're Too Slow

An infamous catchphrase said by Sonic The Hedgehog in Super Smash Brothers Brawl that was immediately turned into a meme likely as soon as it was heard.

Person who wants to play the game: "Bro stop running away!"
Annoying Sonic Player: "yOu'Re ToO SlOw!"