A game where 2 straight men stand in front of each other will completely naked and stare at each other, the person who's penis moves first loses, can go on for hours and is sometimes called a game for horny people
Phill went to toms house and ended up winning a game of stale penis.
Also known as an expired penis, is a penis that has not been used for years at end. Then creating a sour staleness.
Your grandpa has a stale penis...