noun,1. meaning a person mainly a man who enjoys to off his rectum for sale from place to place.
2. A person(man) who enjoys to eat or ingage in sexual activities involving the anus of another person(also mainly a man)
"look at that prat over there!" "yeah what an arsemonger"
"Tom Cruise is such an arsemonger"
Noun , meaning seller of arse. Monger used as in fish monger, iron monger. One who sells arse, a pimp
Goodness ! , these goes that horrible arsemonger, he's not a nice person at all.