An herb grinder intended to be driven by the thumb in one hand to shave an herb with a plurality of blades. The grinder is a rectangular body comprised of a thumb piece, upper cover, pressurized plate, sliding body, central chamber, and bottom chamber. The top thumb piece is serrated for improved grip. The upper cover allows for the insertion of the herbs, spices, or other foodstuffs. The pressurized plate performs a tamping operation of the food product into the sliding body forcing a downward bias against the blades. The sliding body travels along linear indentations of the central chamber during operation to allow the blades to shear the food, which is evacuated from the central chamber into the bottom chamber.