Filoteao' is a Puerto Rican slang term derived from "filo" (edge or sharpness). It means to be "decked out" or "sharp" in terms of appearance, often implying wearing expensive or stylish clothing.
In the song, Eladio Carrion says, "Abuelito dijo que ahorrara mi dinero y mírame / De Gucci filoteao'" (Grandpa told me to save my money and look at me / Decked out in Gucci). It's an interesting word because it showcases a unique regional slang and highlights the artist's success and lavish lifestyle, contrasting with his grandfather's advice.
Eladio Carrion's "Mami Dijo" is a super fun track where he's basically flexing on everyone, but in a really clever way! He starts by telling us about the conflicting advice he got from his parents. His mom said, "Mami dijo que si no tenía nada bueno que decir, Mejor que me quede callao'" [Mommy said if I didn't have anything good to say, it's better to stay quiet]. But then his dad told him, "papi a mí me dijo que no le aguantara mierda a nadie, Déjalo pegao'" [Daddy told me not to take crap from anyone, let it hit]. It's a funny contrast right off the bat!
He then goes on to talk about how he's living proof that his abuelito's [grandpa's] advice to save money paid off, because now he's "De Gucci filoteao'" [decked out in Gucci]. He even brags about how an envious person called him crazy, but he's a "loco que tiene el banco virao'" [crazy person who has the bank turned over/loaded]. He's basically saying he's rich and successful despite what anyone thinks. He even jokes about how he looks good "hasta cuando me visto tirao'" [even when I'm dressed casually]. He's got a great sense of humor and a lot of confidence, and it's all about enjoying his success and not caring what the haters say.