Top Definition
A penis that is extremely small, less than or equal to 2 inches
Man, that guy I had sex with last night had a brenis.I couldnt feel shit...*sigh*
by Jennyfore September 30, 2004
1 more definition
definition: a man's two brains; brain and penis.

background: when men make cloudy decisions due to hormones and typically ... a Hot Female is involved.
that dude thinks with his Brenis!
by mary beth July 28, 2004

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