grinder

One who grinds something, such as the teeth.
A molar.
(slang) Any tooth.
A power tool with a spinning abrasive disc, used for grinding, smoothing, and shaping materials, usually metal.
A sandwich made on a long, cylindrical roll.
A hoagie or submarine sandwich that's toasted or baked and doesn't contain lettuce.
A kitchen gadget for processing coffee, herbs etc. into small or powdered pieces.
The restless flycatcher (Myiagra inquieta) of Australia, which makes a noise like a scissors grinder.
(slang) A fan or performer of grindcore music.
(slang) A biohacker who uses cybernetic implants or biochemicals to enhance or change their own body.
(slang) A student who studies hard; a swot.
(slang) A person who coaches students for an upcoming examination.
(slang) A hard-working, physical player with limited offensive ability.
A low-ranking attorney with no clients who works very hard.
(slang) An outdoor space for drills and parades.
(informal) Atmospheric interference producing a roaring background noise.