ringer

noun15

1. •
   Someone who rings, especially a bell ringer.

   • Pull, if ye never pull′d before; Good ringers, pull your best," quoth he. — 1863
2. •
   A person, animal, or entity which resembles another so closely as to be taken for the other; a look-alike (now usually in the phrase dead ringer).

   • That man over there is an exact ringer for my father!
3. •
   A person highly proficient at a skill or sport who is brought in, often fraudulently, to supplement a team.

   • In this next clip from the security camera, we see that the rube flashing his wad of cash thinks he'll win, but he doesn't realize that the guy in the gray shirt is a ringer.
4. •
   A horse fraudulently entered in a race using the name of another horse.
5. •
   (slang) Any person or thing that is fraudulent; a fake or impostor.
6. •
   (UK, slang) A fraudulently cloned (or cut-and-shut) motor vehicle.

   • I had heard early on in my career about 'ringers': cars that were stolen and cloned, but it was 1993 before I was to experience this first-hand. — 2020
7. •
   In the game of horseshoes, the event of the horseshoe landing around the pole.
8. •
   (Australia) A stockman, a cowboy.

   • The ringers are the stockmen on a station. The cattle pass through their hands before the drovers lift them and take them along the stock routes that lead to the killing pens in cities. — 1964
9. •
   A ringer T-shirt.

   • […] shabby baseball caps, faded and worn-out T-shirts, ringers and polos with artificially aged hems […] — 2007
10. •
    A person who places rings or bands on a bird's leg.
11. •
    A game of marbles where players attempt to knock each other's marbles out of a ring drawn on the ground.
12. •
    [in compounds] (UK, informal) An officer having the specified number of rings (denoting rank) on the uniform sleeve.

    • A group of naval one- and two-ringers were chatting by the office door with a few ratings, complete with kit-bags and oilskins. — 2012
13. •
    (Australia) The champion shearer of a shearing shed.
14. •
    (dialect, UK) A top performer.
15. •
    A crowbar.

noun1

1. •
   (slang) A fan of the novel The Lord of the Rings by J. R. R. Tolkien and/or the film trilogy based on it.

   • One Ringer travels all over and takes pictures of her "Lord of the Rings" figurines. — 2005