walloper

noun

1. One who wallops.
2. (Ireland)A cudgel, a shillelagh.
3. (Scotland, derogatory, slang, vulgar)penis; (by extension) an idiot, a stupid person.
4. (Australia)A police officer.

   “Police! Everyone out! The bloody wallopers are on their way!”

   “Two days later we were picked up by the wallopers on Clucas' information.”

   “Understandably the wallopers were called, and they cleared everybody out.”

5. (slang)Something big; a whopper.

   “I'd had some wonderful fishing, but I hadn't landed a real walloper.”