"4 PREZ" is Cruz Cafuné in full party mode, and the whole joke is in the hook: Lo llamo 'presidente' porque ca' vez que puede lo bota [I call it 'president' because every chance it gets, it bounces]. Botar means to bounce, and in Spanish it sounds exactly like votar (to vote), so a booty that keeps bouncing gets the title. It's a silly pun and he commits to it all the way to the outro, where the Rollie, the car and the suite are all presidencial until Su booty es presiden- cuts off.
In between he brags about a Monday night club that's boomin', tres gummies y despego [three gummies and I take off], and trips on a jet ski a calas [to little coves] with a date. Good Spain-Spanish to steal: tejanos is the word there for jeans, and pibas means girls. He also takes a swipe at fake rappers who por el clout y por pauta venderían a su abuela [would sell their grandma for clout and ad money]. Shallow on purpose, and very catchy.