Jangueé is the past tense of the verb janguear, which means "to party" or "to hang out." It's a very common slang term in Puerto Rico and other Caribbean countries, often used in reggaeton and Latin trap music.
In the song, Justin Quiles sings, "Ya bebí, ya jangueé," meaning "I already drank, I already partied." It perfectly captures the song's theme of trying to forget someone through nightlife and distractions, making it an engaging and culturally relevant word for learners.
Justin Quiles' "YA BEBÍ" is all about that feeling when you're trying to move on after a breakup, but your ex is still stuck in your head. He's out at parties, trying to forget, going "de boca en boca" [from mouth to mouth] and with "culos que yo ni pedí" [asses I didn't even ask for], but nothing works. He keeps thinking, "A otra le di pero no te olvidé" [I gave it to another but I didn't forget you].
He even admits to wasting his charm on other women, saying, "Estoy desperdiciando la labia con babies que no tienen tu magia" [I'm wasting my smooth talk on babies who don't have your magic]. It's a blunt and honest look at how hard it is to get over someone, even when you're trying everything to distract yourself. He's drinking, he's partying, he's with other people, but every morning he wakes up and thinks of her, regretting everything.