To grind weed, and/or open the grinder so that the grinded kush falls into the joint, similar to an egg being cracked over a bowl to make an omelette.

A game to play on a trampoline how to play: one person becomes the egg and curls up in the middle of the trampoline the the person/people try to make that person let go of there knees/not curl up by jumping when they do the egg has been cracked and someone else becomes the egg