Cotorrear is a fun, informal verb that means "to chat," "to hang out," or "to party" in Mexican slang. It's more vibrant and casual than just saying "hablar" (to talk).
In the song, the line "Pa' cotorrear, puro Mexican made" suggests a desire to hang out and have a good time in a distinctly Mexican style. It captures a sense of lively social interaction and fun, making it an engaging word for learners interested in colloquial Spanish.
Netón Vega and Myke Towers spend the whole song on one woman and the distance between how she presents and what she actually gets up to. She arrives like royalty, "Salió Cinderella vestidita y con chofer" (Cinderella came out all dressed up and with a driver), and then the chorus calls the bluff twice in a row: "Se hace la que nunca peca" (she acts like she never sins), "Se hizo el culo y las tetas" (she got her ass and her tits done). The title is her measurements, and the hook prices them without selling them, "90-60-90, ese culito está caro" (90-60-90, that little ass is expensive) followed by "Pero nunca ha esta'o a la venta" (but it has never been up for sale). A compliment and a warning in one breath, which is the joke the song keeps repeating.
Underneath the bragging it is a very Mexican record. The night runs on "Unas Tecates y al arrebate" (a few Tecates and off we go), the boast is "Pa' cotorrear, puro Mexican made" (just to hang out, pure Mexican made), and she gets driven from Monterrey to Guadalajara or Ciudad México because she asked to travel. Vega signs off shouting "Que viva México, cabrones" (long live Mexico, you bastards), which tells you who the flex was really for.