Jangueo is quintessential Puerto Rican slang, derived directly from the English phrase "hanging out". It's a cornerstone of reggaetón culture, meaning to party, chill, or hang out with friends.
In "Un Verano Sin Ti", Bad Bunny uses it to show how heartbroken he is. He sings "yo casi no jangueo" (I almost never hang out) to explain that while he's normally a homebody, the pain of the breakup now pushes him to go out every night just to distract himself.
Puerto Rican superstar Bad Bunny gives us the ultimate sad-boy breakup track with "Un Verano Sin Ti", mixing heavy heartbreak with moments that make you chuckle. While it is bright and sunny outside, he is stuck indoors feeling like it is raining in his room ("En mi cuarto está lloviendo y afuera está el sol"). He takes the blame for the split with a brutally honest apology: "Sorry por ser yo / Y no ser el hombre que te merecías / Yo quizá madure pero en otra vida" ("Sorry for being me and not being the man you deserved; maybe I'll mature in another life"). He admits that while he claims he is fine, her name still keeps him awake at night, thinking about broken plans and missed sunsets in Ibiza.
To cope, he throws himself into the nightlife scene, even though partying is not his normal routine. He uses Caribbean slang like jangueo (hanging out / partying) and teteo (a lively street party), admitting he only goes out hoping to spot his ex from across the room through the club smoke: "Mañana voy a terapia / Hoy voy pa'l teteo" ("Tomorrow I'm going to therapy, today I'm going to the party"). He even references Spanish pop legend Alejandro Sanz's famous 1997 heartbreak anthem Corazón Partío, joking that while Sanz had a broken heart, his own soul is shattered ("Alejandro Sanz con el corazón partido / Y yo con el alma rota"). It is a funny, honest look at dealing with an empty house and unsent draft messages in your phone notes when facing a lonely summer.