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 4, 2008
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a particular shpecies of muffin that resides at "Lick-Wilmerding HS". Said to be the shexiesht little creature with the biggesht penis ever.
by kyel chu January 23, 2003
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