Eriza' is a colloquial and shortened form of "erizada," which literally means "bristly" or "prickly," like a hedgehog. However, in the context of this song, it's used as slang to mean "horny" or "excited" in a sensual way.
DEKKO asks, "Avisa si estas eriza'" (Let me know if you're horny/excited), setting a provocative and playful tone for the song. It's an interesting word choice because it uses an animalistic image to convey a strong human emotion, making it memorable and unique to the song's vibe.
"Ula Ula" is a fun, flirty reggaeton track. DEKKO sings about spotting someone at a club, feeling an instant spark, and inviting them back to his place for the night.
The "ula ula ula" chant is the song's playful hook, a made-up sound that captures the excitement and energy of dancing close with someone new. It's a lighthearted party song about attraction and having a good time, not a deep or serious story.