Top Definition
Where you push the tip of your penis inside of your skin around it the skin around it closes over it. Usually done out of boredom or as a creative way to masturbate.
Joe: Dude, I was really bored yesterday.

Bob: How so?

Joe: I don't know, no one to hang out with. I was SO bored I started doing an innie penis.

Bob: You never were the best with friends Joe.

Joe: I know.
by Mikiflyr February 06, 2014
refers to a male reproductive organ when there is an undescended testicle; the reproductive organ of a masculine lesbian or the male reproductive organ that a dyke desires; refers to the reproductive organ of a hermaphrodite.
She has an innie penis.
by emnm1 December 09, 2009
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