A new item on Taco Bell's menu that includes the main portion of your choice, beans, chips, and salsa, all made with the most digusting ingredients possible. After consuming a fiesta platter, one then has a fiesta in the toilet for days.
"Dude, Alvie, I don't feel so good. I had a fiesta platter for lunch today."
"Oh, me too bro.I had a fiesta in the toilet after that."