Fire Taint is the painful, yet semi-erotic burning of the gludial cleft or taint. Inflammation, itching, burning, and possible bloodiness associated with irritation of the taint (aka - irri-taint), most commonly associated with over-wiping of one's ass. It may be caused by chaffing, rubbing vigourously without proper lubrication or a lack of grundle butter, especially after excercise or long walks combined with high temperatures and exceptionally wet and / or hot farts.
I had many beers and wings last night. Farted and sharted all day......now I have wicked fire taint and can't sit. My girl would not give me grundlatio, I am pissed.