Qué tranza is a highly popular Mexican slang phrase that translates to 'what's up' or 'what's the deal'. While the word tranza can literally refer to a shady deal or a trick, it has evolved into a casual, everyday street expression in Mexico.
In this song, the singer tells the girl "tú sabes bien qué tranza" (you know exactly what the deal is). He uses this localized slang to remind her that they both understand the casual, no strings attached rules of their romance. Learning regional phrases like this is a fantastic way for learners to understand modern Latin music and sound more natural when speaking Spanish!
Fuerza Regida gives a very direct warning in this song. The singer tells a woman that falling for him, a "niño vago" [wandering boy], is a bad idea because he's a "rockstar que no sabe amar" [rockstar who doesn't know how to love]. He's completely honest about his intentions, laying out that their connection is all about parties, alcohol, and physical attraction. He admits they're great together in one way: "somos tan diferentes / Pero juntitos muy buenos pa' comernos" [we're so different / But together we're very good for hooking up].
He repeats the main point over and over: "Pero no te enamores" [But don't fall in love]. He makes it clear that he's not the romantic type who buys flowers. In a brutally honest and kind of funny line, he says that if he ever did send flowers, "tú sabes que fue para culear" [you know it was to f*ck]. The whole song is a clear set of rules for their casual relationship, telling her he's available whenever she's lonely, but that's as far as it goes.