Topetea comes from the verb topetear, which literally means to butt or to hit with the head, like an animal. It's a vivid and somewhat aggressive word that you don't hear in everyday conversation or many songs.
In the context of the song, the lyrics state: "MÁS NO LE PIQUEN LA CRESTA POR QUE SI LE TOPETEA" (But don't provoke him because if you do, he'll confront you/hit back). Here, it's used metaphorically to mean that if you push him too far, he will react forcefully and confront you. It's an interesting way to describe someone's readiness to defend themselves.
Get ready to cruise with El Bebeto's "Etiqueta Azul"! This song introduces us to a character who's all about enjoying life to the fullest. He's always on the move, whether it's for work or just chilling out. He loves the beach, a good glass of wine, and then getting the band together for some fun.
Our guy loves hanging out with his friends, listening to music that ranges from club beats to corridos. He's got cold beers for everyone and whiskey for the ladies. He knows how to unwind, but he's always sharp and aware. He loves to hit the gas in his truck, and he's often out with friends on racers and motorcycles. He's a gentleman with the ladies and knows how to party, especially with his favorite drink: "una de Etiqueta Azul" [one Blue Label]. He's always well-dressed, whether it's casual or elegant, and he has strong family support, with his mother always in his thoughts. He avoids trouble, but don't push him, because he's ready to defend himself with his "cinco siete fajada siempre la traigo" [five-seven always tucked in] and a camouflaged Norinco. His name isn't mentioned, but those who know him know he's always ready for anything. He's a loyal friend, always lending a hand, and it's definitely recommended not to have him as an enemy. So, if you're looking for a song about a smooth operator who knows how to live it up, "Etiqueta Azul" is it!