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
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Last night I went to the Szechuan Bowl now I got that firehea.
by creepodepot November 14, 2008
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