Bellaco is a Spanish slang term that can mean "naughty" or "horny," often used in a playful or suggestive context. It's a word commonly found in reggaeton and urban music.
In "THANK YOU BB," Justin Quiles uses bellaco to describe people at the club who are looking for a good time and perhaps some romantic or physical interaction. He sings, "Aquí to' los bellaco están buscando palga'" (Here all the horny people are looking for a good time), highlighting the party atmosphere and the desires of the crowd.
Justin Quiles and Lenny Tavárez bring us a track that's all about getting over a breakup by hitting the club! Our singer is at a funeral, but it's for his past relationship, and he's chosen the disco as his place to mourn. He's shedding "lágrimas de tequila" [tequila tears], admitting he won't forget his ex because "una hija de puta como tú no se olvida en un día" [a bitch like you isn't forgotten in a day].
But don't feel too bad for him! He's actually having a great time now, saying "la estoy pasando cabrón" [I'm having a hell of a time] and hoping his ex is too. Thanks to her, he's got new friends sliding into his DMs. He even jokes, "De por vida te lo voy a agradecer" [I'll thank you for it my whole life]. The song is a blunt, in-your-face anthem about moving on, embracing the single life, and finding new fun after heartbreak, even if a part of you still remembers the past.