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A complete dumbass. Often used after proving someone wrong.
Jayne: I told you Pee-Wee Herman got arrested for masterbating in a movie theater, schemo!
by kennblack May 21, 2010
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Any person male or female who partakes in terrorising the public by drinking on street corners, having public sex, stealing clothing from washing lines, troubling public transport.

see ned, jippo, chav, spide etc.
That little wanker liam fitzgerald is a true schemo.
by bumbait September 02, 2006
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