Definitions by Marc O-C

fireass 

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. "

fireass by Marc O-C January 27, 2006