Pamplina' is a colloquial and somewhat playful term, a shortened form of "pamplinas," which means 'nonsense' or 'trivialities'. It's not a word you hear every day in pop songs, making it stand out.
In the context of the song, the line "Ella te quita todas las pamplina'" suggests that this person (or perhaps the music itself) strips away all the unimportant, trivial things, leaving only what's real and exciting. It adds a touch of street wisdom and directness to the lyrics.
"Like" is Mala Rodríguez working a dance floor pickup line by line. She opens the flirting with "Acércate mucho háblame bajito" (Get real close, talk to me quietly), and a few lines later she gives in to it herself: "Te estoy conociendo y me está gustando" (I'm getting to know you and I like it). The whole hook is that push and pull, close the gap, keep your voice down, let it build.
The verses turn that flirtation into swagger. She rolls up in something with a "V12 full de gasolina" (a V12 engine, tank full), and by the bridge she and her crew call themselves "asesina', vamos a matar" (killers, we're going to kill it), reggaeton bravado rather than anything literal. "Negras, blanca', gitana', latina'" (Black women, white women, Roma women, Latina women) opens the party up past one flirtation to the whole room, and "No vamos a parar" (We're not stopping) is the closest thing the song has to a thesis.