Extremely hot diarrhea that burns your anus on the way out. Usually the result of eating spicy Mexican food, followed by a long night of drinking.
Dude my anus is burning, I've had Firehea all morning!
by Gaysofthunder69 September 29, 2011
hot & spicy diarrhea
Last night I went to the Szechuan Bowl now I got that firehea.
by creepodepot November 14, 2008