A sexual act where someone places their mouth on another person's anus and recieves a heaping pile of red-hot diarrhea. Certain spicy foods may enhance the pleasure for all parties involved.
Cale: "Man, I have a really weird taste in my mouth today!"
Brian: "Really, what did you eat last night?"
Cale: "No, not eat; I got a big helpin' of Swedish Fireball. Man, that poo was everywhere!"
This is the sexual act of fucking til the guy is about to cum and just before he does, he pulls out and replaces his dick with an open bottle of hot sauce. Not only is her vag on fire but her face gets so red from anger it appears to be a fireball as well.
Susan's vagburned for two days after that atomic fireball last week. I wonder if she'll call me back...?