Definitions

1. noun

A person who kills old or worn-out animals, especially horses, for their hides or meat, or a person who buys and kills animals for the meat trade.

“The knacker was called to collect the old horse from the farm.”

2. verb

To kill or slaughter (an animal) for its hide or meat, typically in the context of the meat trade.

“The old horse was knacked by the local butcher.”