Malandro is a slang term used in many parts of Latin America for a gangster, thug, or troublemaker. It evokes a 'bad boy' image, often associated with street life and illicit activities.
In "POR ESOS OJOS," the singer dramatically declares, "Por esos ojos me hice malandro" (For those eyes, I became a thug). He uses this powerful word to show the lengths he'd go for his love, framing his tough persona as a direct result of his devotion to her.
Fuerza Regida lays out a life of contradictions in "POR ESOS OJOS." The singer has clearly made it, announcing he's escaped poverty: "De la pobreza fui a salvarme" (I went to save myself from poverty). He now has the diamond chains and luxuries to prove it. But all this success comes with a dark side. He's become a "malandro" (a gangster or thug), and he's ready for trouble, warning that "Pa'l envidioso cargo aparatos" (For the envious one, I carry weapons).
Despite the tough talk and the list of perks like "lujos, fama / Joyas, culos" (luxuries, fame / Jewels, asses), he admits it's all a bit empty. In a surprisingly honest moment, he says "Tengo todo y nada me llena" (I have everything and nothing fulfills me). The one thing that seems to matter is a specific person. He's willing to do anything for them, telling them directly, "Por esos ojos, yo robo y mato" (For those eyes, I steal and kill). It's a song about getting everything you thought you wanted, only to realize the only thing that's real is the person you'd risk it all for.