ratter

noun5

1. •
   Anything which catches rats, especially a dog trained to catch them.

   • Grey cat called Snooky who was a good ratter even with his balls cut off. — 1963
2. •
   A rat dog.
3. •
   A rat terrier.
4. •
   One who rats; a traitor; a deserter.
5. •
   A pirate miner, a miner who digs out ore or paydirt clandestinely and runs