"Kbron Y Medio" is Christian Nodal getting over a breakup the loud way. It opens with him smoking, a few drinks too many ("Con unos tragos de más", with a few drinks too many), deciding that "yo no estoy tan mal" (I'm not doing that badly). The night is "buena como pa' llorar" (good for crying) over the woman who doesn't love him, but he talks himself out of it: maybe if he goes out, things get better.
Then the chorus flips the mood. His kisses "ya no vuelven a ser pa' una sola" (will never again be for just one woman), his diary is open and there is time for everyone, as long as nobody gets attached ("Nomás no se claven", just don't get hooked). The reasoning is blunt: if being good gets you cheated on ("te ponen los cuernos", literally they put horns on you, the Spanish idiom for being cheated on), he has found his cure.
Learner notes: "pa'" is the spoken form of "para", and "cora'" is short for "corazón" (heart). "Cabrón" is a strong word, roughly a bastard or a badass depending on tone, and the title spells it with a K. The punchline says it all: if someone tells you he turned into a cabrón, "diles que un cabrón y medio" (tell them, a cabrón and a half). It is cocky, a bit much, and very catchy.