arse

noun4

1. •
   (Commonwealth, vulgar) the bottom, the two soft round parts at the back of a person's body that they sit on

   • As the novel progresses, he is shot in the hand with his own gun, shot in the arse with someone else's and lacerated by a prosthetic weed trimmer. — 2011
2. •
   (vulgar, offensive) A stupid, pompous, arrogant, mean or despicable person.

   • “You're an arse,” Ellen said. ¶ “Please? You must like something about me …?” ¶ “I do. You're an arse. I just told you that. I feel comfy with you, because you're such an arse.” — 2007
3. •
   (slang, vulgar) A person; the self; (reflexively) oneself or one's person, chiefly their body; (by extension) one's personal safety, or figuratively one's job, prospects, etc.
4. •
   (slang, vulgar) Used in similes to express something bad or unpleasant.

exclamation1

1. •
   (Commonwealth, vulgar) An expression of frustration.

verb1

1. •
   (slang, vulgar) To be silly, act stupid or mess around.

   • Stop arsing around!

noun1

1. •
   Abbreviation of arylsulfatase E, an enzyme, deficiencies in which are associated with abnormalities in cartilage and bone development.