Tristón is a diminutive form of triste (sad), meaning "a little sad" or "sad-ish." It's a less common and more endearing way to express sadness, often implying a melancholic or slightly downcast mood rather than deep sorrow.
In the song, the singer uses it to describe himself: "Yo soy el mismo, pero solo más tristón" (I'm the same, but just a little sadder). This word adds a touch of vulnerability and relatability, making his heartbreak feel more personal and less dramatic, which can be very enticing for learners.
Jesús Ortiz Paz spends this entire song grieving a relationship that never actually started. That is the joke and the ache of it at once: "¿Si no fuimos nada / Entonces por qué duele todo?" (If we were nothing / Then why does all of it hurt?). He never even got the kiss. "Y ni siquiera un pinche beso te robé" (And I didn't even steal one damn kiss from you) is the line he keeps returning to, and it stings more than a real breakup would, because he has nothing to point at as proof it happened.
The small details are what make it land. What he is mourning is "la racha que teníamos de meme'" (the streak of memes we had) and the hints she used to drop on TikTok, and the only thing that has visibly changed is her hair: "Que te pintaste el pelo para verte diferente / Yo soy el mismo, pero solo más tristón" (You dyed your hair to look different / I'm the same guy, just sadder). He drinks about it, tells his friends until they are sick of hearing it, and still calls her "mi loca" (my crazy girl). Fuerza Regida play the whole thing completely straight, with no wink, which is why a song about a situationship ends up hitting like a real breakup.