(n.) a vagina that is infected with some sort of disease (not necessarily gangrene),appears generallyunhealthy visually, or is displeasing to one's olfactory sense.
Ned: I am telling you bro, Erika is smoking hot, but when I got them panties off......man, it was like I was facing off your granny's gangrenous hole.
Neal: Dude....how do you know about my granny's snatch?
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.
the special bond between a group of girls or guys, a romance between 3 or more straight people, who arent actually going out but they are pretty much in love
Person 1: "wow claire, claire, claire and kitty have such a gangmance"
Person 2: "yeah wow i wish i could be part of their gangmance