Bélico means 'warlike' or 'bellicose'. It's a powerful adjective that describes something related to war or aggression, and it's not a word you hear every day in pop songs.
In the context of this song and the current music scene, "bélico" is particularly interesting. It's often used in the genre of "corridos bélicos" to describe a tough, street-smart, or even dangerous persona. The artist uses it to describe himself, saying "Ay, mamá, bélico, pero no tanto" (Oh, mom, warlike, but not that much), hinting at a tough image while also showing a softer, more romantic side. This contrast makes the word very engaging and relevant to understanding modern Mexican music culture.
This song is a wild ride through a guy's head at night. One minute he's totally heartbroken, thinking about his ex under the full moon. He misses her kisses and remembers their intimate moments, pleading with her, "Pero hay amor, no digas que no" (But my love, don't say no). He even asks her to tell little white lies if she has to, just so he can pretend she still loves him, promising her jewels and roses.
But then, the mood flips completely. He sings, "5-7 me la navego" (I cruise around with my 5-7), a reference to a type of pistol, showing off his tough, "bélico" side. While he's missing his ex, he's also "Fumando un gallo, de otros culos me acuerdo" (Smoking a joint, I remember other girls' asses). He's caught between genuinely missing his "princesa" and getting distracted by a party lifestyle of beaches, tequila, and other women. It's a classic case of wanting what you can't have, while also not being ready to give up the single life.