1. [mid-16C+] the anus.
2. [1920s+] (orig. US) the least appetizing, poorest, most run-down and dangerous area of a city or town or place.
3. [1930s+] (orig. US) a general term of abuse for an individual.
4. [1940s+] (also arsehold) the end, the back of anything.
5. [2000s] courage.
[1940s+] very drunk.
[1990s+] (also assholery) stupidity, nonsense; bad behaviour.
1. [late 19C+] sycophantic [arsehole crawl v.].
2. [1990s+] a general derog. term.
3. used as adv.
[2000s] acting like an idiot, being annoying, a general derog.
[1960s+] a homosexual male (cf. asshole bandit under asshole n.).
[1950s+] extremely fortunate.
[1900s] a short jacket.
[1970s] a sycophant, a toady.
[late 17C; mid-19C+] applied to anywhere considered especially unpleasant on a global or, hyperbolically, local level.
[1960s] (Aus.) very dark.
1. all the way, all the time, completely.
2. very unsatisfactory, totally confused, very chaotic; thus not know if it is arsehole or breakfast time v., to be very confused.
[1960s] (N.Z.) to harass, to berate.
[2000s] to infuriate.
[1920s+] to be an absolute fool; to be wholly disorientated.
[1920s+] extremely stupid.
see take it up the arse under arse n.
[1990s+] to talk nonsense.
[20C+] to work furiously.
[1950s+] in difficulties, facing problems.
[mid-16C–mid-17C] absolutely dark, totally black.
[late 19C+] rubbish! nonsense! .
[20C+] a general excl. of disdain, dismissal, arrogant contempt.