To use a two piece bud grinder without the bottom piece, so the bud sprinkles out the bottom. This usually happens when one person's bud is already in the bottom of the grinder and someone else asks if they can use it.
Person 1: Yo man can I borrow your grinder?
Person 2: Yea, but my bud is already in there so you're going to have to cheese grate
In Mixed Martial Arts, when performing a takedown against the cage, pressure is kept against the opponent as they are lifted and slammed back down, their head and any other part of their body against the cage is smashed against it, they are the cheese, the cage is the grater.
Ufc Fan 1:He just dragged him to the ground Hard!
Ufc Fan 2: Yeah he totally cheese grated his face against the cage!