Espejismo translates to "mirage". It's a captivating and somewhat uncommon word that evokes a sense of illusion and false hope.
In the song, the singer uses it to dismiss the idea that he will eventually understand his partner's decision to leave. He sings, "Pero te digo ya mismo / Que eso es un espejismo" (But I tell you right now / That's a mirage), implying that the idea of him moving on easily is a deceptive illusion. This makes the word particularly impactful in conveying his disbelief and pain.
Have you ever been in that moment where someone is trying to break up with you, and you're just not having it? That's exactly the vibe Leonel Garcia gives us in "Con Otra"! He's basically saying, "No way, this isn't happening!"
The song kicks off with his partner telling him it's over: "Dices que pare / Que el baile se acabó" [You say stop / That the dance is over]. But he's not buying it, calling it a "espejismo" [mirage] and a "grave error" [grave mistake]. He can't imagine life without her, especially when he sings, "Sin ti en mi cama / No tengo casa" [Without you in my bed / I have no home]. He just doesn't want to dance with anyone else, repeating, "Yo no quiero bailar con otra" [I don't want to dance with another]. For him, her "lengua es mi danzón y tu risa mi reggae" [tongue is my danzón and your laugh my reggae], and her "cintura" [waist] is a cumbia. He even admits, "Sé que perdí, me equivoqué y que te dejé escapar" [I know I lost, I made a mistake and I let you escape], but he's begging her to come back because his feet won't move "Con otra" [With another].