What is Bappo?
1.
Marajuana
Derived from Po (also meaning Marajuana) and Bape (a popular clothing label)
BapePo -> Bappo
Originates from South-East London (Greenwich, Charlton)
I bought some Bappo, wanna go out for a J?
Dean shots the best Bappo
See 
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just another variation of w00t or woot but slightly more sarcastic with an element of not caring and non-committal
Girl - Hey when you ..