a portmanteau (that is, the physical union of two words or more into one) between the words "fiesta" (Sp. word for party) and "fiasco" that refers to a bad party, esp. when the party's guest attendance is a very small percentage of the actual guest expectation.
Dude, the unpopular girl's party was such a fiesco: out of the 30 guests on the list, only 4 showed up, two of which where her parents.
by Karim Pluma June 09, 2008