Preseas is a conjugated form of the Puerto Rican slang verb presear. It doesn't have a direct translation, but it means to show off, to posture, or to act jealous in a provocative way, especially when you no longer have a right to.
In the song, Daddy Yankee repeats the line "¿por qué preseas?" ("why are you fronting?"). He's calling out a woman who is already in a new relationship, yet gets jealous and makes a scene when she sees him with someone else. It's a unique and powerful slang word that perfectly captures the song's central conflict.
Puerto Rican superstar Daddy Yankee delivers the ultimate "moving on" anthem with this bachata-infused remix of "Lo Que Pasó, Pasó". The story is simple: he had a fantastic night with someone, only to find out she was already taken with the line "Esa noche contigo la pasé bien / Pero yo me enteré que te debes a alguien" ("I had a good time with you that night / But I found out you belong to someone"). Instead of falling into drama, he closes the door for good: "Lo que pasó, pasó / Entre tú y yo" ("What happened, happened / Between you and me"). When she realizes he has moved on, she gets jealous and starts blowing up his phone, even though he warns that "tú fallaste / Pero ya es tarde" ("you messed up / but now it's too late").
The track is packed with colorful Puerto Rican street slang that makes his response hilarious and direct. He calls out her sudden jealousy by repeating "Presea, dale, presea"—using the urban slang presear, which means to hassle, pressure, or stalk someone. He playfully reminds her that he has options because "otra mujer me gardea" (from the basketball term to guard, meaning "another woman is covering/checking me"), adding the clever saying "pocos son los indios y hay mucha india en la aldea" ("there are few Indian men and many Indian women in the village"). Backed by Luny and Mr. G on the production, the song turns a messy romantic betrayal into an infectious dance track where he gladly leaves the cheating behind to enjoy his single life on the dance floor.