What do you mean by shake?????

Being from the UK and all, I am not quite upto scratch on the US slang!
WeedLovingVeteran Reviewed by WeedLovingVeteran on . Selling Idea Came up with the idea last night to take all the shake from my bag, roll it into J's, and sell those. Good way to move that last bit. That, or just sellin a bag of shake for cheaper lol. Rating: 5