The result of eating at any Mexican restaurant but particularly Taco Bell, Del Taco, Chipotle or cheap Mexican food. Can also be a result of overindulgence at a party with regards to alcohol and/or food.
I had Chipotle last night and now dealing with a bad case of Fiesta Butt all morning.
by Kerri René Peek June 12, 2016
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when a load of people cum in someones ass, then get a piece of celery and scoop all the shit out and eat the celery.
"jimmy got a butt fiesta last night!"
by conj February 13, 2004
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