Festa means festival in Italy and other Mediterranean countries. But you can get that from google, so heres an urban dictionary definition:
Festa is annual celebration by the Korean group BTS, held to celebrate their anniversary. For a week and a half leading up to the anniversary of their debut, 13th June, they release more music, interviews, photo collections, special videos and more. When Festa starts, BTS fandom create a BTS week wherein they appreciate each of the 7 members for each day of the week, in fanchant order of course.

when you're hungover as shit after a spending a night drunk as a skunk

a girl who is either really nasty (un-hygenic) or who you have no interest in, or both. especially applies if that girl is way too into you or pitifully desperate. comes from verb:Festering see def.

Festa is a very rare disease only found in the Miami suburb of Hialeah. Particularly the area surrounding, but not limited to, Hialeah Senior High. Although there is some speculation as to how one can contract it, scientist believe it is via coming in contact with bodily fluids such as skeet and feces. The disease goes through 79 stages before finally killing the victim in agonizing fashion, usually with the genitalia of the victim falling off.

As of 2006, there is only one known victim in the United States.

this boy has a 1inch cock, he is a bald spotty cunt who likes boys as well..he fucked a dog!

Festa is a female dog's name. She is often easy to handle and very obedient. She walks very graceful, and is very nice.

To bum or suck up 2 another person, as well as interfering or trying to find what some one is up 2.