prison fart 

A fart which resembles the qualities attained in a male prison. Due to the unmeasurable amounts of anal sex, the anus is loosened, and thus, farts exit the anus without making much noise

Dude... That was a prison fart! Cut that sh*t out!

prison fart by Jason January 1, 2004

poison fart 

Flatulence with the ability to clear a large room of people.

Damn it! Ruben layed a poison fart in the living room so he could have the TV to himself,stinky bastard.

poison fart by Rub Dogg August 28, 2006