"Reen" is a shortened version of Pipareni (Pie-pah-ree-nai) and is part of a newly emerging language created by recreational drug users similar to cockney rhyming slang but from the North East of England. Using this language, it is easy to talk about anything illegal and not let slip any details. A Pipareni is simply a pipe, through which various forms of cannabis are smoked. The term was originally created by HSH
"Ha'weh lads, wa gaan fo a reen"
"Aye, av got Stanger next n it's fuckin wank. Let wi' gaan fo a reen"
"Fuck it, have a reen"
Carved into big Hunt's dog-tags. Literally it is phonetic geordie for
"Would you like to go and smoke some illegal substances with a pipe?"
"Gaan fora" is how a geordie would phonetically spell "going for a" for the meaning of reen see reen
"gaan fora reen doug?"
"We've got Stanger next let wi gaan fora reen"