Green’s Dictionary of Slang

(W.I.) echoic, onomat. words representing the sound of an object or objects crashing to the floor; gunfire, or other sudden noises.

1937		E. Mittelholzer Creole Chips 27: Brang, brang! ‘Ow, baay!’ [...] On with the bram!
1973		A. Salkey ‘Joshua and Emmanuel’ Jamaica (1983) 76: Bruck up the far back spell, [...] Bragadap the control / an’ cause some healthy bangarangs!
1973		E. Braithwaite ‘Ritesc’ in Arrivants 198: Is all ver well when it rosy an’ sweet, / but leh murder start an’ bruggalungdung!
1980		A. Clarke Growing Up Stupid Under the Union Jack 66: I nods my cap to the ’Pire, and from that moment on it is bram! bram! [...] the fastest bowling in island!
1986		O. Senior ‘Ballad’ Summer Lightning 112: Next thing I know you go to try out what you learn and braps we have another bastard in the house.
1995		Francis-Jackson Official Dancehall Dict. 6: Bram-bram a celebratory expression, imitating the sound of gun-fire.
1996		Allsopp Dict. Carib. Eng. Usage 114/1: Bra.dam!; Bras.daps!; Bra.da.rax! [...] Bra.ga.dap!
2005		Dict. at welovejamaica 🌐 BRADARAX! : echoism for sudden noise created when a light object drops.
2017		theculturetrip.com ‘Guide to London Slang 10 Jan. 🌐 Brap! – representing oneself, bigging yourself up.