Gatuna is a fun and poetic adjective that literally means "feline" or "cat-like". It's the feminine form of gatuno.
In the song, Ricky Martin creates a vivid image by singing "sigue bailando la luna, luna gatuna" (the moon keeps dancing, the cat-like moon). This paints a picture of the moon being sly, agile, and mysterious as it moves across the night sky, just like a cat. It's a creative and memorable word that perfectly captures the playful, all-night party vibe of "La Bomba".
Ricky Martin is here to tell you about a special drink called "La bomba" [The Bomb]. What is it? Well, according to him, it's a drink that will change your life! The recipe sounds pretty magical: "Agua de risa / Con unas gotas de rosa / Y una aceituna sabrosa" [Water of laughter / With some drops of rose / And a tasty olive]. Just one tiny drop is enough to make you go "loca divertida" [fun crazy], and the whole song is about the wild party that happens when you drink it.
This isn't just any party, though. It's an "intensamente vivida" [intensely lived] night where the energy just keeps building. People are dancing, doing half-turns and then another, and the singer is getting driven wild by it all. The effects of "la bomba" are powerful—soon, "sale volando la ropa" [the clothes go flying off] and even the "luna gatuna" [cat-like moon] starts dancing. It's a picture of a night where everyone lets go completely, feeling joyful and uninhibited.