Everyone has a shitty day once in a while. Fireass is when your
ass gets irritated by sweat activating the fecal matter left behind from a sub par wipe after shitting.
More
common on hot summer days, fireass takes several hours to develope, and has
different levels depending on the intensity of discomfort experienced.
" Oh
man, I took a shit this morning, and I've been sweating like a
pig... this FIREASS is killing me. I got level three FIREASS. I'm gonna
go sit in a snowbank. "