Nuclear Fart
A fart so bad that the putrid smell embeds itself almost permanently into absorbent materials such as fabric. Similar to the half-life of radiation lasting for years after a nuclear bomb.
Dude, this couch still smells like ass from your nuclear fart last week. It has never smelled the same.
Nuclear Fart
When you fart so loud in a room or area that everyone stares at you in an awkward silence.
Pat just had the biggest nuclear fart in the waiting room.