Peda is a colloquial and very common Mexican Spanish slang term for a party or, more specifically, a drinking spree or a night of heavy drinking.
In the context of the song, the singer admits to calling his ex "borrachito en la peda" (a little drunk at the party/drinking spree), highlighting a moment of vulnerability and regret during a night out. It's a word that adds a touch of authentic, everyday language to the lyrics.
Christian Nodal's "¿Quién + Como Yo?" [Who Else Like Me?] is a relatable anthem for anyone who's ever been absolutely wrecked by a breakup. He's not just feeling down; he's convinced he's "el que anda peor" [the one who's doing the worst]. He blames his ex for taking his life with her, saying "se llevó mi vida y Se la di con V de vuelta" [she took my life and I gave it back with a V]. It's a pretty blunt way to say he gave her everything!
Nodal really gets into the nitty-gritty of post-breakup despair. He asks, "¿Quién además de mí Le marca cada fin Borrachito en la peda Pa' que se acuerde de ti?" [Who else besides me calls every weekend Drunk at the party So she remembers you?]. It's a funny, slightly desperate image, isn't it? He also talks about staring at his phone, "Esperando un mensaje Que nunca les va a llegar" [Waiting for a message That will never arrive]. Even though his ex doesn't want him back, he still wants to return. It's that classic heartbreak scenario where you just can't let go, even when you know it's over.