Top Definition
n. When one's penis is so small, that it looks like a muffin.
Leo Yu got kicked in the balls, so his dick never grew; it's a penis muffin.
by Ivana Dick February 04, 2008
a particular shpecies of muffin that resides at "Lick-Wilmerding HS". Said to be the shexiesht little creature with the biggesht penis ever.
Kyel Chu, Freshman
by kyel chu January 22, 2003

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