chucker

noun

1. One who chucks; a thrower.
2. A bowler who throws or chucks the ball rather than bowling it.
3. (alt-of, alternative)Alternative form of chukker.

   “[…] each chucker, which lasts only seven and one-half minutes. Sometimes when horses are sufficiently rested they are reinstated at a later period in relay fashion.”

   “[…] polo, with hundreds of girls, dressed very much like nurses, flattening out the hoof marks after each chucker; […]”