when the person does something so stupid that you can use the word dumb as a noun.
Jordy: "so, what your ethnicity?"

Larry: "My great Grandparents Immigrated here from Germany"

Jordy "oh, so you're from Germany? That makes you Germanese, right?"

Larry "... You're a Dumb"
by Ira Sex Ira 696969 November 4, 2009
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used when someone has just made no sense whatsoever or if they have just expressed their undying love for you.
fair skinned girl-"porque???"
cool softball girl-"you're dumb, i hate you."

"let's make baby!"
"you're dumb."
by lisa dragonsoul September 10, 2006
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Often used as an insult when an individual is expressing self admiration or pride for themself especially through an intellectual achievement to show that the said individual is in fact unintelligent or lacks smarts even though a mental challenge was gained.
'I got an A+ and you failed lol'
'I'm actually a realist'
'What's a realist?'
'well you're dumb so'
by trumpet67 December 8, 2015
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a sarcastic term used as a 'comeback' or insult to deter other bullshit and win an argument. often used out of context and meaning, to confuse an individual.
cunt 1: 'i got 10 out of 10 on physics quiz!'
cunt 2: 'well you're dumb so..."

AHA
by susaddict1995 October 13, 2015
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1. (slang) Used to give emphasis
Girls: Your wife is pregnant Like/more than/same as I think you're dumb
Rehan: Pregnant cats are not for girls
by JayMoneySpamsL2 February 19, 2019
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