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Someone so completely stupid that they are unworthy of the term "dumbass".
That assdumb Tony has gone and upfucked my Playstation.
by chillin2long June 04, 2003
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2
something or someone that is extremely stupid
Irene was being an assdumb when she received an 82 on a math test.
by jberk3 June 16, 2017
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