used as a negative argument, expressing disbelief for any situation or sentence - not to use around formal people, unless very close to you (as in a business meeting with some old partners, for example).
Can also be used as a synonim to beat someone really hard.
O cara é rico? Rico o cacete! Ele não tem nada! - That guy, rich? No fucking way! He ain't got nothing!
Você é o chefe aqui? O cacete! Zé Maluco é que é o chefe! - You're the boss here? My ass! Zé Maluco is the Boss!
Se ele não parar, vou dar um cacete nesse cara! - If he doesn't stop, I'm gonna beat the guy's face up!
A policia chegou e desceu o cacete! - The cops arrived and beat everybody down!
Oh cachiiga my dawg that was so insanely dope I can’t contain how freaking stoked I am rn my dank tank is through the roof and I’m ready to go rage and freaking jabwow!!
A large collective of alpha-type male predators, typically gathered together in a noisy group so as to frighten away resource competition, as they aggressively pursue craft beers, televised football games, drunken females, and homoerotic hazing rituals.
The designation of a type of geocache used in the GPS game of geocaching that contains an unknown element that needs to be figured-out before the location of the cache becomes knowable. Examples of mystery elements that a mystery cache could contain include: games to play , field puzzles using information found at the listed coordinates, information hidden within the cache page or content, passwords, ciphers or codes and many more possible unknowns.
Holy crap, it took me a week to discoverthat the password to that mystery cache was shamalamamoomoo!