1 definition by Magic M

acorn penis

A penis so small that it's actually only the head, with no shaft whatsoever.

Masturbation would be so much easier if I didn't have an acorn penis.
I think penis size is passed down from generation to generation, so if I have a child, he will have an acorn penis for sure.
I would really like to wear my new speedo to the pool, but there are ladies there and I have an acorn penis.

by Magic M December 17, 2006