weed crumbs. some dealers try to sell it by calling it "pre-grinded", but don't fall for that bullshit. buying shake is like buying a bag of dorrito crumbs. wouldn't you prefer regular dorritos?
The small bits of bud that settle to the bottom of your broken-up stash; it should not be confused with keef. Also can refer to buds that have been very finely ground.
Shake is very good for rolling joints and blunts, because it burns very evenly, slowly, and consistently if you roll it well.