Knacker(n.) One who makes knickknacks, toys, etc.
Knacker(n.) One of two or more pieces of bone or wood held loosely between the fingers, and struck together by moving the hand; -- called also clapper.
Knacker(n.) a harness maker.
Knacker(n.) One who slaughters worn-out horses and sells their flesh for dog's meat.

Words within knackered