2 definition by MechaMonkey

Top Definition

The tailgunner on a WWII bomber.

Pilot: We have a bogey on our six!
Co-Pilot: Don't worry, the assgunner's got 'em.

by MechaMonkey September 28, 2004

the proportion of a person's rump to the rest of their body.

Wow, that girl must have an ass fraction of at least a fifth!

by MechaMonkey September 28, 2004