'Shitgun' can be called by one person out of more than one people that need a dump, and are faced with one toilet.

when you're hungover as shit after a spending a night drunk as a skunk

Called immediately after someone calls "shotgun". Rather than getting the front passenger seat right away, you get it on the way home instead.

v. an act of character assassination

n. a method of character assassination

a gun that fires shit everywhere

A maneuver popular amongst native Asian youths. It is executed by clasping both hands together with both index fingers extended, sneaking up on an unsuspecting victim, and attempting to sodomize said person with the index fingers.