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A freakishly large penis, usually accompanied by large testicles.
Unlike a chode, a macropenis is both wide and long.
Bob has a macropenis, and it is a terrible burden for him.

Alice has a crippling fear of macropenii.
by jeroknite February 23, 2014
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3
An usually large male sexual organ, capable of receiving another male sexual organ in its urethral canal.
OMFG, is that a macropenis?
by Ubermensch April 10, 2005
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4
The exact opposite of what Herb has
Herb was at the Chargers game and looked over the urinal divider and claims he saw a macro penis. Turns out, it is all perspective. He was looking at a 9-year-old boy.
by the coMANd'r September 20, 2018
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