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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
A person with an abnormally large penis.
Long Dong Silver, Shaquille O'Neal
by Assweepay August 13, 2003
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