I know you are, but what am I?

An amateur insult comeback. It is often regarded as one of the worst possible insult comebacks, being criticized for its lack of creativity, low versatility, and manipulation of English grammar in the word "you."

The comeback was popularized by a scene from the 1985 film 'Pee-Wee's Big Adventure,' in which Pee-Wee Herman repeatedly says the comeback after being told a string of insults by someone else.

Mark: You should have let me copy your test answers in class today.
Jim: No, it's against the rules. Stop relying on me to bail you out all the time. You're such a blowhard sometimes...
Mark: Oh, yeah? Well, you're a coffee whore whose father is on crack!
Jim: I know you are, but what am I?
Mark: You're a loser who doesn't let me copy your test answers in class!
Jim: I know you are, but what am I?
Mark: -_- seriously dude

by A Person Named August 11, 2013

I know you are but what am I

Basically you can't come back from it unless you use an Uno reverse card. An op roast for kids 7-10

Gay1:your mum gay lol
Gay2:no u

Gay1:uno reverse card

Gay2:I know you are but what am I

Gay1:fuck

by Oh crackers April 26, 2019

Noah I know You Looked This Up

WHY DID YOU LOOK THIS UP

Noah I know You Looked This Up.

by UD BNA FAN May 17, 2021

wouldn't you like to know, weather boy?

Very sketch sentence used bu juvenile delinquents to throw off reporters.

+Here's an actual customer out here, uh what's the best kind of firework to buy?

- Wouldn't you like to know, weather boy?

+Where are your parents? Kid's sketchy, back to you guys.

by Eldeirun July 13, 2023

you don't know me but i killed your brother

If you say the phrase 'You don't know me but I killed you're brother,' your actually telling that person you kicked their cat and you're very sorry.

"Tim, you don't know me but I killed your brother."

by YoUrMoThEr6969 November 11, 2007

I know you are but what am I?

A complete fail of a comeback... basicaly... you would use it when you get verbally bitch slapped your face is all red... and you cannot come up with a comeback.

Faggot: You smell bad

Me: Wow... because you said that dis you went from nobody loving you... to having a small squirl start to love you... oh wait... that squirl just got ran over by a car... your back to nobody loving you...

Faggot: I know you are but what am I?

by balla911 April 16, 2009

i know you are but what am i?

A phrase used to signify that an argument has degraded to an immature level. Used as a response to someone that's turned a friendly discussion in to a personal argument.

Person 1: I hate iphones!
Person 2: I think they rawk. iPhones for everyone!
Person 1: You're a poo brain.
Person 2: I know you are but what am I?

by an0nym0usc0ward February 05, 2010