What does Arse Muncher mean?

Arse Muncher meaning in Urban Dictionary

people whom enjoys the munching of arse. Occasionally in slang providing someone else in prison with a 'Tossed Salad' will need an Arse Muncher to complete the job. Even though they munch, they hardly ever ingest anything that gets in their particular mouth.Also beneficial in the cleansing for the bowel.