grinder

noun19

1. •
   Any of various machines or devices that grind things, such as by grinding them down or grinding them up.
2. •
   Any of various power tools with a spinning abrasive disc, used for smoothing, shaping, or deburring materials, usually metal.
3. •
   A grinding machine: any of various machine tools for grinding (either heavy or light grinding, but precise either way).
4. •
   Any of various pieces of heavy equipment for grinding.
5. •
   A kitchen gadget for processing coffee, herbs etc. into small or powdered pieces.
6. •
   A sandwich made on a long, cylindrical roll.

   • I am going to the deli to get a grinder for lunch.
7. •
   In particular, a submarine sandwich (hoagie) that is toasted or baked and typically does not contain lettuce.
8. •
   A low-ranking attorney with no clients who works very hard.
9. •
   (slang, old-fashioned) A student who studies hard; a swot.
10. •
    (slang) A hard-working, physical player with limited offensive ability.
11. •
    One who grinds something, such as the teeth.

    • scissors grinder (one who sharpens scissors)
12. •
    A molar.
13. •
    (slang) Any tooth.
14. •
    (slang) A biohacker who uses cybernetic implants or biochemicals to enhance or change their own body.

    • Rich Lee – one of the organisers of Grindfest, and the Transhumanist Party’s ‘bio-hacking adviser’ – estimates that there are around 3,000 grinders in the US, and many more bio-hackers. — 2017
15. •
    (slang) A fan or performer of grindcore music.
16. •
    (US, slang) An outdoor space for drills and parades.

    • Company formations are held on the grinder (basketball court outside the Quarterdeck). — 2013
17. •
    The restless flycatcher (Myiagra inquieta) of Australia, which makes a noise like a scissors grinder.
18. •
    (informal) Atmospheric interference producing a roaring background noise.
19. •
    (slang, old-fashioned) A person who coaches students for an upcoming examination.