noun
(Commonwealth, now vulgar) The buttocks or more specifically, the anus.
(chiefly UK, Ireland, Commonwealth, derogatory, slang) A stupid, pompous, arrogant, mean or despicable person.
(vulgar, slang, uncountable) Used in similes to express something bad or unpleasant.
(vulgar, slang, metonymic, countable) 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.
verb
(Commonwealth, slang, intransitive) To be silly, act stupid or mess around.
interjection
(Commonwealth) An expression of frustration.