Arsemaster

(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)

1.

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!

2.

Teacher: LAZY FUCKING DOUCHEBAG!

Teacher's boyfriend: You tell him Ben! *gropes arse*

Me: You guys are arsemasti.