Noun: Traditionally a New Mexican celebration lasting all day long that entails slaughtering, butchering, and burying a pig in a bed coals for a slow roast. Then a large dinner to feast upon. Also, reference to an intriguing evening spent with a female shared by two males that encapsulates ones wildest dreams, hence a pig roasting on a spit.
Chester: Yo, we gotta get this girl back to the crib.
Chris: Fool you think she's really down?
Chester: Hell yeah she's down, she was as giving us dances at the club.
Jane Doe: You two ready for this mantanza?
Chester: I told you bitch, that Rossi gets these pussies Glossi!