Piquetúa is a fantastic example of Puerto Rican slang that you'll hear in a lot of reggaeton songs. It's the feminine form of piquetúo and is used to describe a woman who has a lot of pique—a unique mix of style, swag, confidence, and attitude.
In "Moscow Mule," Bad Bunny sings, "Me gustan así, piquetúa" (I like them like that, stylish/with swag). He's using this word to praise her sharp sense of style and confident way of carrying herself, making it a powerful and trendy compliment.
Moscow Mule brings you right into the middle of a messy, late-night situationship that Bad Bunny cannot seem to shake. From the first line, he lays out the dynamic: neither person reaches out first unless things get late and drinks start flowing. He sings, "No somos nada, pero estamos envueltos hace rato" ("We're nothing, but we've been involved for a while"), keeping things secret to the point where she does not even save his contact name or picture on WhatsApp ("Whatsapp sin el retrato, no guarda mi contacto").
The track is packed with casual Puerto Rican slang. When he says "dos tragos y sabes que me pongo bellaco" ("two drinks and you know I get horny"), he is being totally direct about his mood after hitting the bar. He loves her bold attitude ("piquetúa", meaning full of swagger) and uses basketball slang to admit she played him completely: "Tú eres una player, me hiciste un crossover / Esta vez metiste, me diste game over" ("You're a player, you crossed me over / This time you scored, you gave me game over"). By the time he orders another drink and dreams of waking up on a beach in Bali or Cancún ("Pide otro Moscow Mule"), you realize he is caught up in the thrill of the chase, even if they are both pretending not to care.