The central refrain, "tra, tra, tra, tra," is an onomatopoeic sound common in Spanish urban music that mimics the rapid rhythm of the dance, specifically the "perreo" style.
Tra-tra, baby (Hasta abajo, baby) ... Tra-tra is just imitating a sound that matches the rhythm of the song, like "boom boom" or " Reddit·r/Spanish 01 Tra Tra m4a
Electronic, House, and Reggaeton (often categorized as "Latin House"). The central refrain, "tra, tra, tra, tra," is