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1. dumb dick
any person who is a generally stupid or ignorant asshole
You dumb dick!
2. Dumb dick
A man that is very horny and stupid that only thinks with his dick
that guy with his cock out is such a dumb dick
3. Dumb Dick
A 6'4'' manchild with a Peter Pan complex and three dimples.
That Otis Maier is such a Dumb Dick.
by Saraphone Oct 25, 2004 add a video
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