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1.
{Blimmi's}hot chunks of drugs such as pot or base that have fallen from a joint causing burnings of the trousers or legs
shit man, those blimmi's have ruined my new threads
by ReNeGaDe_Of_FuNk June 26, 2005
 
2.
A airtight transparent plastic bag, like the ones you get small items like buttons in, which is used to contain illegal drugs, such as cannabis.

Also called a blimbag of a baggie.
"Oi lads, has anyone got blimmi for my grade?"
by Tiode August 19, 2007