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1.
When a mans penis is in hibernation all year round and never gets to see the time of day...and the only way to see the head of the penis is to push in the belly button of the person who has the inverted penis.
Hey guys, why cant we ever see Jareds dick?
Because he has an inverted penis that is in hibernation.
by gingerssuck June 01, 2009
 
2.
When someone has a penis that is so small that it actually looks like the penis is heading inside the body.

--mostly found in asians
That kid tyler has an inverted penis.

Dude i hear that the new asian kid at our school has an inverted penis
by thiskidlovesurbandic December 05, 2009
 
3.
When some bitch is all nasty like a hoe ass hoe bitch and you start to get a boner at first cuz she looks got then shes a stanky bitch and ur shit goes inverted and basically turns into a vagina.
Ah, that bitch was nasty, i got an inverted penis now, fuck fuckity fuck fuck, damn bitch.

or

Gary: Hey t-bag tom? is that bitch makin ur penis inverted?
Tom: Ha, yup!
by Gary January 25, 2005