A female's vagina possessing a rotten or fowl stench, usually synonymous with the smell of fish-sauce or brussels sprouts and string beans. It is a direct result of unsuccessful cleansing of the flaps in the vicinity of the vulva. Often, a rancid flange will have the appearance of a decayed and rotten split opened peach.
Gorge: Man, it smells like string beans and a rotten shit-fart around here. I can't even breath.
Zoran: Yeh, no doubt. Obviously, Prudence just stepped in. She should be sprayed with an elephant hose aimed directly into her twat. I mean, shit, its a safety hazard. Her rancid flange will bring impotence to us all!!