Nosebag
Small polythene recepticle containing approximately 0.8 grams of novocaine, talcum powder and self-raising flour. 
Commonly hawked in the pubs and bars of Blackpool by craven miscreants with the guile and finesse of a hippo and the morals of a psychopath.  

Cocaine, Charlie, Chaz, Tram, Nose, Bolivian Marching Powder
Jim: Fucking hell I was pissed last night.  I paid £40 for a Nosebag off of Dodgy Dave!!

Jonny:  You tight cunt I asked you for a line and you said you had fuck all!!!

Jim: You didn't miss much mate, it was a bag of wank!!