A 15 minute sexual encounter between a girl, and one or two guys. Usually filmed and photographed for internet consumption. The "fiesta" generally occurs in the last minute or so, with the lovely young lady receiving a protein-enriched facial.
Kim is never late for a Cumfiesta.
by keyshaw May 02, 2004
Largely similar to standard masturbation, but presumably more vigorous and, well, festive. Think of it as the Memorial Day of auto-eroticism.
You guys have a good time tonight, I'm just going to stay here, watch the O'Reilly factor, maybe later have a cum fiesta.
by Finneagan Cyril von Vandehagan August 07, 2006