If you are eating baked potatoes, and you come across a potato with a green spot on it, said potato is therefore, a gangrene fairy. NOTE: the green spot may have a few little brown spots on it.
"YUCK!! I JUST ATE A FAT OL' GANGRENE FAIRY!!" *Throws up and dies*
When your penis has been insulted so much by, lovers, potential lovers, other males/students/peers, that what little blood you already had flowing into it now stops, cutting off your circulation and causing your penis to, blacken, shrivel, dry up, and then promptly fall off. This then spreads to other parts of the body until death but, you are writhing in SO much pain from your overly circumcised chumpy chode, that you don'teven notice it.
Person #1:"Fuck man! I got Penis Gangrene!"
Person #2: "GET THE FUCK AWAY FROM ME FAGGOT!"
Background: Once upon a time, Trishank Karthik was listening to the Groove Armada song, "Suntoucher", from the album, "Goodbye Country (Hello Nightclub)". Somehow, the lyrics were so badly misinterpreted by Trishank, that some phrase in the song was unfortunately assumed to be "killah gangrene". Till this day, he has been unable to find this exact phrase in the actual song lyrics.
Definition: Used to denote when something is totally cool. The mental imagery of gangrene, especially a killah one, adds to the effect or flavour.
Yo, Groove Armada be droppin' some real killah gangrene beats, ah!