Amerita comes from the verb ameritar, which means "to merit" or "to deserve." It's a powerful and slightly more formal way to say that something is justified or warranted.
In the song's title and chorus, "Se Amerita," it's used to declare that a celebration is absolutely deserved after overcoming hard times ("La mala racha pasó" / The bad streak passed). This single word captures the song's entire theme of triumphant celebration and enjoying the fruits of one's labor.
Junior H is throwing a massive party in "Se Amerita", and the whole mood comes down to one big idea: things used to be tough, but now it is time to celebrate. He spells it out directly with "Claro que se amerita, en mi rostro una sonrisa / La mala racha pasó" [Of course it's earned, a smile on my face / The bad streak is over]. When a bad run ends in Mexican slang, you don't just sigh with relief—you bring out the live band ("La banda llegó" [The band arrived]) and hit the road.
The lyrics give us a checklist of high-speed toys and favorite places across Mexico. He talks about flying high in a "Cessna para pilotear" [Cessna plane to pilot] and kicking up dust in an "Rzrsón" (an off-road Polaris RZR vehicle) for trail riding ("pa' las rutas, un polvaderón" [for the trails, a big dust cloud]). He even cruises through top spots like Puerto Vallarta, Culiacán ("Culichi"), and Tijuana just to hang out ("pa' dar el rol" [to cruise around]). Alongside the good times, he values the people who kept him safe along the way, shouting out a loyal friend ("Junto a mi carnal, no es de sangre, pero demostró lealtad" [Next to my brother, not by blood, but he proved loyalty]) and the security backing him in a Rubicon. It is a straight-up anthem for treating yourself after surviving rough times.