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1.
the ultimate post-insult comment
"Yeah, well, jimmy, your a pussycunt!"

"OH NO HE DIDNT!"
by fuck boy October 19, 2004
 
2.
A form of sarcastic irony deriving from its original use as an expression of incredulity. Often used after a oneliner or emphatic statement to mock the speaker.
"He was never in time for his classes . . .Then one day he wasn't in his time at all."

Oh no he didn't!
by Shiggity and Trionna September 06, 2010