1.one who masters the arse.
2.one who excells in the use of arses for pleasure
3.one who fucks unsuspecting bystanders up the arses hen they aren't looking then runs off into the bush before they can figure out whodunnit
you are an arsemaster
to be a master of the rectum. If in US use "ass master", then followed by the word chump.
you's aint nothin but an arse master bitch!!
Leader of a party of politicians
(adjective) (phonetically: arse-mar-stir)
Common insult like "dick" and such. Can be used to describe Justin Beiber and other people you don't like.
arsemasti (plural) (phonetically: arse-marst-eye)
Teacher: Why haven't you done the hand-written, 900 page essay I set for you yesterday you lazy fool?!
Me: I have dyslexia sir.
Teacher: That is no excuse you retard! (starts frothing at mouth)
Me: You're such an arsemaster!
Teacher: LAZY FUCKING DOUCHEBAG!
Teacher's boyfriend: You tell him Ben! *gropes arse*
Me: You guys are arsemasti.
That would put me in charge of you then, you arse
D.O. is an arse