1) Pubic hair around the anus.
2) Someone who is a complete ugly idiot.
1) Man! He had a lot of arsegrass!
2) That freak over there is such an arsegrass.
The basic clothing of the New Guinea Highlands, being two large hanks of grass stuck into a belt, one fore, one aft.
The Mt Hagen Sing Sing moves on the rustle of arsegrass.