Acicálate comes from the verb acicalarse, which means 'to spruce yourself up' or 'to get all dolled up'. It's a fun, less common word for getting ready, like preening or primping before you go out.
In the song, Bad Bunny uses it in a cheeky, flirtatious way, telling the girl to get herself ready for him. This specific and playful use makes it a really interesting word to learn for understanding the nuances of modern reggaeton.
"Una Vez" teams up Puerto Rican hitmaker Bad Bunny with Mora for a late-night reggaeton track that is entirely about a forbidden, temporary fling. The premise is laid out right from the jump: a woman is stuck in an unfulfilling relationship where her boyfriend no longer keeps her entertained ("él ya no te entretiene"). Instead of promising forever, the singers offer an exit strategy for just one night: "déjame sentirte una vez, por si no te vuelvo a ver / Luego lo sigo normal con mi vida, y tú la tuya con él" ("let me feel you once, in case I don't see you again / then I go on as normal with my life, and you yours with him"). It is a blunt proposal with zero long-term commitments, promising that both sides will simply return to their separate lives once morning comes.
What makes the song fun is its playful, street-level Puerto Rican slang. Mora brags that the boyfriend is nothing special, calling him "sólo un resuelve" (just a quick fix, or somebody who simply fills a temporary gap). Bad Bunny then leans into full confession mode. He claims he does not believe in love at all, yet finds himself praying to God just to see her undressed. He also notices small details like how her eyes turn red from "Indica" (a cannabis strain) and how she hides behind a "carita de nena buena" (good girl face) despite sneaking out. It is sneaky, direct, and completely unapologetic about living entirely in the moment.