Definitions

1. noun

A person who cuts or files metal, especially one who removes the edge of a coin or a piece of metal to make it fit into a particular slot or to reduce its value.

“The firker was hired to remove the excess metal from the coin to make it fit into the vending machine.”

2. verb

To cut or file metal, especially to remove the edge of a coin or a piece of metal.

“The coin was firkered to make it fit into the slot.”