Palideó comes from the verb palidecer, meaning "to turn pale" or "to go pale". It's a vivid and somewhat dramatic word that isn't used in everyday conversation as frequently as more common verbs.
In the context of the song, it describes the physical reaction of someone who has smoked too much marijuana and is feeling overwhelmed or unwell, turning pale as a result. This specific usage makes it memorable and directly ties into the narrative of the song.
Aleman's "La Pálida" featuring Elijah King and El Pinche Mara is a fun, cautionary tale about smoking too much weed! The song kicks off with some friends asking if the weed is good, and Aleman confidently says, "Nomá', ahorita vas a ver" [You're about to see].
Things quickly escalate as the lyrics describe getting super high, with lines like "Yeah, you got high on the good shit" and "Yeah, you got high." The song then tells a story about a girl who smokes with them and, despite being warned, takes too many hits. She ends up getting "paleteando" [pale] and feeling like she's flying, even wanting to walk because she feels like she's floating. Aleman even admits, "Confieso que esa noche nada más me paniqueó" [I confess that night just panicked me]. It's a humorous and relatable look at the unexpected effects of really strong weed, all while celebrating the good times with friends.