A term usually used when someone says something they think is funny but it is actually fucking gay. Best used during the akward silence after the fuck face is done speaking.
"That picture is really cool."
"Thats what she said!"
....................... "YOU DUMB!"
by king josh April 9, 2008
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Toronto slang, you tell someone when they’re acting stupid, or tryna be something they’re not. Pretty casually used, not that serious.
Example 1:
“are u dumb? You know who mans is? I’m not afraid of no wasteman!”
Example 2:
Person 1 - “yo wanna go to timmies grab some timbits and shit?”
Person 2 - “boi are you dumb, I gotta wedding tomorrow, not tryna look like a fucking burnt chicken nugget loll
by kingoftoronto November 28, 2017
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a grammarly bad way of saying 'are you dumb' insult
you: is you dumb?!
me: are you dumb because your grammar is incorrect haha!
by Dude09990 November 28, 2017
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When some asshole says something so stupid you want to say "why man", you just ask them if they're dumb.

If they say no, then they're dumber than you even thought.
Idiot: Justin Bieber's the greatest singer ever!

Normal Human Being: Boi, are you dumb?! My CAT sings better than that bitch. Get a life, man.
by It'sCakeAtStake March 19, 2019
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A catchphrase originally made by Daniel Su. It has been stolen on numerous occasions by Ali Ahmed, who paid Colby Schwartz to incorrectly label him as the creator.
Daniel Su: *says anything*
Ali Ahmed: *types: !urban are you dumb or are you dumb*
by dexti_ April 17, 2020
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You the person who’s going to downvote this again and won’t let me put a definition for AHI TUNA!
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