Grinder definition, a person or thing that grinds. See more. grinder. a container filled with small nails or little poles fitted into the insides to help grind marijuana up to make rolling blunts easier. Will often come with a keef. This Slang page is designed to explain what the meaning of grinder is. The slang word / phrase / acronym grinder means . Online Slang.
What is a grinder Video