walloper

noun6

1. •
   One who wallops.
2. •
   (Ireland) A cudgel, a shillelagh.
3. •
   (Australia) A police officer.

   • Police! Everyone out! The bloody wallopers are on their way! — 1950
4. •
   (slang) Something big; a whopper.

   • I'd had some wonderful fishing, but I hadn't landed a real walloper. — 1969
5. •
   (vulgar, offensive) An idiot; a stupid person.
6. •
   (vulgar, offensive) The penis.