Enloquecer means "to go crazy" or "to lose one's mind." It's a dramatic and expressive verb that immediately conveys intense emotion.
In "Voy A Beber," Nicky Jam uses this word to describe the overwhelming effect of alcohol and his feelings for a woman. He sings, "Hoy voy a beber, y sé que voy a enloquecer," suggesting that drinking will lead him to a state of intense passion and perhaps reckless abandon, all driven by his desire for her. It's a word that captures the song's theme of losing control in the pursuit of love and pleasure.
"Voy a Beber" is Nicky Jam's ode to drowning heartbreak in alcohol for a night out. The singer decides that tonight, he's going to drink until he loses control, telling an ex he'll call her later once he's "gone mad" from the liquor.
From there the song follows a classic reggaetón night-out arc: he heads to the club to drink, dance, and escape reality, invites a stranger over to make him forget, and admits that no matter how many drinks he has, he can't stop thinking about the woman who gave him so much pleasure.
The counting hook ("un trago, dos tragos, tres tragos...") captures him getting progressively drunker as the night goes on, each drink pulling him closer to picking up the phone and calling her again. It's a song about using a party to cope with wanting someone you can't have.