Explosão literally means 'explosion'. It's a powerful and dramatic word that perfectly captures the high-energy feeling of Brazilian funk music.
In the song, the hook 'Olha a explosão!' (Look at the explosion!) isn't about a literal bomb. It's a metaphor for the show-stopping and impactful moment when the girl dances, creating a burst of energy on the dance floor that everyone stops to watch.
If you step into a Brazilian street party, MC Kevinho is here to warn you about one particular dancer. In "Olha A Explosão", he calls this girl "terrorista" (a terrorist) and an "especialista" (a specialist). In Rio and São Paulo funk slang, calling someone "terrorista" does not mean they are dangerous in a criminal way; it means their dance moves are devastatingly good. She rolls up to the "baile funk" (funk dance party) with her friends and takes over the room. Kevinho warns the crowd twice: "não mexe com ela não" (don't mess with her) because she is literally explosive.
The entire track builds toward that exact moment: "Olha a explosão" (Look at the explosion). The "blast" is not gunpowder, it is purely physical dance impact: "Quando ela bate com a bunda no chão" (When she hits the floor with her butt) and "Quando ela sarra" (When she sarras—a staple funk move where you thrust or grind to the heavy beat). The repetition of "chão chão chão chão" (floor, floor, floor, floor) hammers down right on beat with the bass drum, matching the bounce of the dance step. It is loud, blunt, party-starting music with zero hidden metaphors.