A deadly type of flatulence, occurring when an individual has an overuse of steroids or protein.

It is actually documented on Canadian Biological Containment Registry (CBCR) that these farts are a biological and nucleur threat and those that inhale this deadly substance will become a zombie or piece of brocoli.

PRO-TEEN FAH-ARTT
(NOUN)
Paulo: Yo fucking Luke let a fucking protein fart the other day...
Nick: DAYUUMM! Did you------
Paulo: Yea, I got the vaccine. Matt's dad actually gave me the shot
Nick: Fucking guy... Bet hes still on those roids...
Paulo: Aiight lets go to the docks
Nick: ROFLCOPTER!
by DJ Paulojustownedyourass November 19, 2008
The equivalent of a H-Bomb coming from one's ass; these farts have the ability to linger for minutes, and can even spread through multiple rooms.

Beware of anyone with protein farts.
John: *farts*
Bill: ...dude, did you jus- WTF IS THAT SMELL?
John: PROTEIN FART, RUN!!!!!!!!!!!!!!
Bill: *runs to his room* ARGHH, IT FOLLOWED ME IN HERE.
Jack: *opens his room* WTF IS THIS SMELL COMING INTO MY ROOM?
John: Sorry guys, I can't help it.
by DeathTaco February 08, 2010

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