¿Y qué fue? literally translates to "And what was it?". However, in the Dominican Republic, it's a very common slang phrase used to ask "So, what happened?" or "What's up with that?", often with a challenging tone.
In the song, Don Miguelo uses this phrase to taunt someone who talked a big game but couldn't back it up. He sings, "¿Y qué fue? no hiciste nada" (So, what happened? You did nothing!), making it a key part of this energetic Dembow track.
Don Miguelo brings absolute Dominican party energy in "Y Que Fue", and the whole track is basically him calling someone out for talking a big game and then failing to deliver on the dance floor. The title question, "¿Y qué fue? no hiciste nada" ("And what happened? You didn't do anything"), sets the tone right away. He teases his dance partner for acting tough beforehand, only to freeze up when the fast-paced rhythm kicks in.
He piles on the Dominican street slang and humor to make his point. When he says "metiste la pata" ("you messed up") and "deja ese paquete" ("stop the fake front" or "cut the lies"), he is laughing at the contrast between her online persona and reality. He jokes that she claimed to be "una movie de TNT" ("an explosive action movie on TNT") and posted "nasty" photos, but when the music actually started, "te volviste nothing" ("you became nothing"). Driven by loud onomatopoeia like "ran-kitikan, kinkan" and demands for more rum because the engine stalled, it is a playful, high-tempo track made purely for dancing without taking itself too seriously.