Meat Mace 

when you helicopter (spin) your dick in a circular motion so face that all the blood goes to the head, cause it to bulge like a sphere. Resembles a mace

Guy 1: Dude you! Your head is going to explode!
Guy 2: Don't worry man! It's just a meat mace, everyone's been doing this since kindergarten.

Meat Mace by jffellis2 October 22, 2013

Meat mace 

A wang or Largeish penis.

"Dude! Put your meat mace away!"

"I call him Mr Dongski."

Meat mace by Allabaster November 9, 2009