Me rento literally translates to I rent myself out, an unusual and humorous way to say you're available for anything, especially in a casual, party-related context.
In the song, the singer uses the phrase "Para el desmadre me rento" (For the chaos I rent myself out) to jokingly offer himself as the life of the party. It plays on the idea of being for hire purely for fun and good times.
Eden Muñoz's "Me Rento" is all about embracing the party life with open arms! Our singer is getting some flak for his wild ways, with people asking if he'll ever change and warning him about his health: "Me preguntan que si un día no pienso cambiar / Que a ningún lado voy a llegar / Que no sé qué, 'Bájale ya' / Que el hígado me va a tronar" [They ask me if one day I don't plan to change / That I won't get anywhere / That I don't know what, 'Calm down already' / That my liver is going to burst]. But he's not bothered, declaring that he was born to drink and will only calm down when he gets married – and that's a long way off!
He's basically putting himself up for hire as the ultimate party expert! He's got "experiencia en la peda" [experience in partying] and is great at emptying coolers. He's even got a special promotion for the night, offering discounts for students and promising to get whatever's needed for the fun. He's ready to go "pa' donde sea" [wherever] the party takes him. So, who's ready to "rentar a este cabrón" [rent this guy] for a night of pure