Gata literally translates to "female cat". However, in many Latin American countries, it's a common slang term for a woman, similar to "chick" or "girl" in English.
While it can sometimes be used in a derogatory way, in this song's context—"Mi Gata" (My Girl)—Junior H uses it as a term of endearment for the woman he misses. The entire song is a lament about losing his "gata," making this a central and memorable piece of slang to learn.
Junior H and Gael Valenzuela deliver a classic sad-boy corrido tumbado that mixes luxury name-drops with genuine post-breakup misery. Right off the bat, the opening line sets a messy tone: "Ya no es mi Dom Péri y tampoco es mi gata" ("She's no longer my Dom Pérignon and she's not my girl either"). Comparing an ex to high-end champagne while using the street slang "gata" (literally "cat," used here casually for a girl or partner) shows someone trying to act cool, but failing miserably. The lingering scent of her "perfume de Chanel" ("Chanel perfume") is stuck in the bedsheets, completely unraveling any tough-guy act as he admits, "estas ganas de tenerte me consumen" ("this desire to have you consumes me").
Instead of moving on, he is stuck drinking "un whisky a las rocas" ("a whisky on the rocks") and wondering if his own bad reputation ruined things: "No sé si fue la culpa de mi mala fama" ("I don't know if it was the fault of my bad reputation"). Even while wallowing, he clings to gossip, pointing out that her friends know she still cries over him when drunk ("hasta tus amigas saben que me amas / Que cuando estás borracha, lágrimas derramas"). It is an honest, slightly stubborn look at being stuck on someone who has already walked out the door.