Regaños is the plural of "regaño," coming from the verb regañar (to scold).
In the line "Gracias a pai y a mami por to' los regaños," Bad Bunny thanks his parents for every telling-off that molded his character. It’s a colorful, less-common noun that learners rarely see in songs, making it both useful and memorable.
In "<3", Bad Bunny signs off his album YHLQMDLG with a direct, spoken-style thank you to everyone who backed him from day one. He is in full victory-lap mode, bragging that he hasn't missed on a single track ("Como yo, que no he fallado una canción" [Like me, who hasn't missed a single song]) and shouting out his spot performing at the Super Bowl: "Abuela, bendición, hoy cumplí otro goal / Me fue cabrón, no sé si me viste en el Super Bowl" [Grandma, your blessing, today I accomplished another goal / It went amazing, I don't know if you saw me at the Super Bowl]. He compares his consistency to LeBron James switching jersey numbers, drops lines about chatting with wrestling star Triple H, and teases that he wants to drop one more album in nine months so he can step away like Puerto Rican boxing legend Miguel Cotto: "Pa' retirarme tranquilo como Miguel Cotto" [To retire peacefully like Miguel Cotto].
Under all the swagger, though, he admits the celebrity life is wearing him out: "Pero hablando claro, gente, ya ni duermo / Y esto de la fama me tiene hasta enfermo" [Plainly speaking, people, I don't even sleep anymore / And this fame thing has me sick]. He grounds himself by thanking his parents for scolding him growing up, laughing that since he got sent to bed early as a kid, he now lives by the album's title: "Hago lo que me dé la gana" [I do whatever I want]. Puerto Rican slang powers the whole track: cabrón swings between meaning someone is incredible or calling out fake peers, domi gives love to his Dominican listeners ("Gracias a to' mis domi" [Thanks to all my Dominicans]), and pai y mami are warm neighborhood shortenings for dad and mom.