A massive radio-cassette player, usually carried by stoned and thuggish black youths.
"Look at that cocky twat with his Brixton briefcase blaring out niggershit"
by Jerry Winston September 09, 2003
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A Mcdonalds/KFC burger box, as seen carried by every black male in Brixton
they all got on the tube stinking out the place with their Brixton briefcases
by howsyourdad March 22, 2006