Meaning
The loud horn blast — a real air horn or its electronic sample — that a selector sounds to salute a hot tune and hype the crowd at a dance. The parping 'braaap' of the air horn punctuates the drop, the rewind, and the biggest moments of the night, a call-and-response signal that the tune is 'a murderer'. A staple of dancehall sound-system culture alongside the dub siren.
Examples
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Braaap! Di air horn a blow fi di tune.
Braaap! The air horn is blasting for the tune.
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Di selecta sound di air horn pon di rewind.
The selector sounds the air horn on the rewind.
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Air horn mean di tune big.
An air horn means the tune is a big hit.
Origin
From 'air horn' (the loud horn); a hype signal in dancehall. See [[dub-siren]], [[buss-a-blank]].
How it’s used
A horn blast to salute a hot tune and hype the crowd. See [[dub-siren]], [[gun-finger]].