Top Definition
1. A very small penis which cannot be seen with the naked eye.
2. An invisible penis
3. What one might consider a unic to have.
4. Every man's worst nightmare.
Elyse is lucky she is no longer dating Max because he has an invisi-penis.

Max:Yo, Joe I had the worst dream ever. Dave: What was it about?
Max: I dreamed I had an invisi-penis!!
Dave:That wasn't a dream.
Max: Nooooo!!!!!
by Dave Phillips June 25, 2005
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