Vetin is a slang term, a diminutive of "veterano" (veteran), often used in Brazilian hip-hop and funk to refer to a young person who is experienced or skilled in the streets, in hustling, or in their craft.
In the song, Orochi uses "vetin" to describe himself and his journey from humble beginnings in the favela to achieving success and wealth. It highlights his street smarts and resilience, emphasizing that despite his youth, he has the wisdom and experience of a veteran in the game.
"Dia De Baile" is Orochi's celebration of leaving poverty behind. Over a heavy Brazilian trap beat, Orochi and his guests (Leviano, MC Maneirinho, Galdino, Filipe Ret, with production from Kizzy and TkN) trade verses about the fast climb from the corner of the favela to private jets and designer clothes.
The hook gives the song its title: on "party day," a woman shows up dressed to impress, and the singer plays it cool even though he knows exactly what she is really after. Brand names like Volvo, Balmain, Paco Rabanne and aged whiskey work as shorthand for how far he has come from where he started.
The song is explicit and unapologetic. Bragging about new money without shame is a defining move in Brazilian trap, and this track leans all the way into it.