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when a girl always hangs out with guys to the point that she is treated as one of the guys. a girl with a social penis will be 'one of the guys' when in a group, but is still considered fuckable material when hanging out with just one guy. she's the type of girl who's cool with crude humour and sexist comments and isn't afraid to add to the conversation.
that girl is always out with the guys. she has such a social penis.
the girl acts like such a guy. she has a social penis.
by twister no.2 March 04, 2012
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