Josear is a Spanish slang term that means "to hustle" or "to work hard to make money," often in a street-smart or unconventional way.
In the context of this song, Omy De Oro uses it to highlight the difference between those who talk about success and those who actually put in the work. He says, "No hablan de josear, no saben qué es eso" (They don't talk about hustling, they don't know what that is), emphasizing his own dedication and street credibility compared to others.
"Designer" is Omy De Oro's celebration of making it, told through the brands he can finally afford. Gucci, Balenciaga, Louis V, and Yeezys stand in for a life that used to be out of reach, and every mention of them is really a mention of how far he's come.
But the song never lets the flex stand alone. He keeps circling back to where he started: the friends who fell, the ones still locked up, the people who turned their backs along the way. Wearing designer clothes doesn't mean forgetting any of that.
The chorus, "Viviendo como si muero mañana" ("Living like I'll die tomorrow"), ties it together. The luxury isn't vanity, it's urgency: celebrate now, with the people who are still around, because nothing is guaranteed.