a)Someone who's being/ acting retarded
b)someone who pisses you off
c)someone who's mean to you for no reason
d)someone who doesn't comment you back on myspace.
Or just a really annoying person you dislike.
"Shut up, you're being such a deuchewa"

"Look at her, she's such a slut.
"I know, she's a deuchewa."
by LelahMunster November 12, 2007
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