Duffer

A sifting device used to remove shake and/or B Buds from finished A grade cannabis buds. Usually jury-rigged on the farm from chicken wire and random materials or can be purchased in stores made from plastic. Used by shaking cannabis in the sifter until separated.

"I've got this pound you wanted, but they have quite a bit of shake in em. Do you have a duffer?"

Duff

noun: The small particles of cannabis, or "shake", in the bottom of your bag of weed.

verb: To remove the shake from finished cannabis buds.

Noun: "Hey check out this pound of Blue Dream I got!"
Looks at bottom of bag, "I don't know man looks like theres an bunch of duff in it.

Verb: "Gotta duff that shit out bro."

"Have these packs been duffed?"