A grinder is a circular metal, steel or wood device used to breakdown marijuana to make rolling joints, blunts or packing a bowl easier. You’ll find that most grinders are separated into two or three sections: a top area with small, sharp teeth and holes, which sifts the marijuana through to a lower section where one can use the broken down weed how they desire. For most higher end grinders, there will be a third section that lets kief through, which a lot of users will use to pack on top of bud in a bowl. Many people use a grinder instead of breaking apart marijuana with their fingers so as to avoid getting sticky fingers.
“Not sure how you’re rolling that blunt without a grinder. It’s going to take you forever, bro.”