A valid response to any insult and/or challenge. Even if you are unable to back up the line, saying it is enough to make anyone else's argument invalid.

Stemming from the show Gurren Lagann as a popular catchphrase.
1: You are so stupid.
2: Who the hell do you think I am?!

1: You couldn't win if you tried.
2: Just who the hell do you think I am?
by reggin kcalb January 6, 2014
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universal parent language for stop. referenced all the time, such as in a netflix special of the comedian john mulaney. suprised nobody has defined this yet.
sometimes, our parents would ask us "what do you think you're doing?"
but that just meant stop.
they didnt expect you to just say
"well im smashing these eggs with a bottle rocket, you know because im so horny and angry all the time, and i have no outlet for it all, so... eggs."
(not a direct quote)
by Apeshit Crazy May 3, 2021
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A retort to use on Karens who believe "iT's AlL a HoAx"
Karen: IT'S ALL A HOAX!!!!!!!!!!!1!1!111!!!!!ONE!!!!ONE!!!! I'M NEVER GETTING THE VACCINE BECAUSE IT HAS MICROCHIPS IN IT!!!!!!!!!!!!!!!!!!!!!!!!!1!11!!!!ONEONEONE!!!!!!!!!
Person with brain cells: Who do you think you are, the CDC? Newsflash: you're not, so shut up, Karen 🙃
by Pialinist May 19, 2021
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when someone of male gender giggles like a little Japanese school girl and asks his friends if he giggles like a Japanese school girl while high on massive amounts of weed.
Gay 1: oh my god you giggle like a Japanese school girl

Gay 2: WTF? DO YOU THINK I JAPANESE LIKE A SCHOOL GIRL!
by Archduke of Douchebags January 13, 2019
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Rhetorical question asked of or when discussing a person who is acting in an annoying, stereotypical manner or is a poser.

Rambo
Barbie
Jesus
The chocolate solder: Military.
Tinkerbell
Princess Daine
Adolf Hitler
Einstien
To female who is obsessed by her own appearence; Who do you think you are? Barbie.

To a male who is overdoing the macho; Who do you think you are? Rambo.

About a bible thumper; Who does he think he is; Jesus Christ.
by Blue Cawdrey November 24, 2004
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One of the most popular lines from the anime Gurren Lagann. When using this line, you put on those W that go like this: \/\/, only longer. This is because the most popular character, Kamina, wore them every time he said it.
Guy 1: Do you want a sandwhich?
Guy2: Just who the Hell do you think I am!?
Guy 1:...I'm gonna take that as a no.
by NostalgiaRipoff September 5, 2009
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