a semi-cheap flavor of marijuana. "piffs" is very widely used because of the regular pricing (10 for a dime, 20 for a dub, 5 for a nick, 50 for half O, 100 for O) and gets u high real well
wagwan is a jamaican patois or jamaican english way of saying "whats up"
piff means "high quality", and ting is the autistic version of saying "thing"
a bbm pin is the numbers you'd use to contact someone on the blackberry messenger