Morrillo is a colloquial term in some Spanish-speaking regions, particularly Mexico, for a 'kid' or 'youngster'. It's a more informal and endearing way to refer to a young person than niño.
In the song, the lyric "Es de morrillo nos quedamos con la con mi cuerno por un lado" suggests a narrative of growing up quickly or being involved in certain activities from a young age, with "cuerno" (horn) likely referring to a firearm in this context. The use of morrillo adds a touch of regional flavor and authenticity to the storytelling.
Polo González and Adrián Gallardo invite us into a world of celebration and success in "Y Me La Paso"! This song is all about enjoying the good life, with Polo telling us, "y me la paso conocido Ando en la mano en los más será a ti para pasear debandono" [and I spend my time known, I'm in hand in the most will be for you to walk around]. He's living it up in Los Angeles, ready to "festejar" [celebrate] and calling up contacts for "lavadas para activarnos" [drinks to get us going] because it looks like it's going to be a long night!
It's not just about partying, though. Polo also reflects on his journey, from doing errands for his dad in Tijuana to where he is now. He mentions, "en el trabajo me la llevo bien calmado porque todo controlado están las cosas" [at work I take it very calmly because everything is under control]. He's proud of how he's made the most of his opportunities, saying, "la frontera que no dio el lugar yo lo supe aprovechar" [the border that didn't give the place, I knew how to take advantage of it]. It's a fun look at someone who's worked hard and is now enjoying the fruits of his labor, always remembering his roots and the advice from his father.