Hell Fart 

A Helll Fart is when you fart and your ass explodes and you die.

Me: My brother died yesterday.
Friend: Oh my! How?
Me: He... He... Hell Farted.
Friend: NOOOOOO!

Hell Fart by Lenwooo March 17, 2013

Fart as hell 

An slang way of saying something is ridiculous/ridiculously bad, similar to the phrase "____ as hell."

Person 1: Did you hear about that guy who thought it was okay to like child porn?
Person 2: Yeah! That was fart as hell dude!

Fart as hell by minnicle August 31, 2020