Billy Bob

Probably THE most overused protagonist name in indie games.

Guy 1: Hey bro, I'm making a game!
Guy 2: Cool, what's it about?
Guy 1: This guy named Billy Bob who's-
Guy 2: Change that name.

Shotgun Shit

A form of diarrhea that is not only liquid like normal diarrhea, but come out of the anus at extreme pressure.
If you don't sit down fast enough when you have the shotgun shits, you won't hit the toilet. The wall looks like it was hit by a shotgun full of shit, hence the name Shotgun Shit.

Person 1: "last time i ate taco bell i got the shotgun shits"
Person 2: "damn, same"