[1930s+] (Aus./N.Z.) the head.
[1940s+] (Aus./N.Z.) an over-emotional person.
[1940s+] (Aus./N.Z.) emotional instability.
[1940s+] (Aus./N.Z.) to lose one’s temper (with someone).
[1940s+] (Aus.) to plead guilty in court.
[1950s+] eccentric, insane.
[1930s] (Aus.) to agree.
[1930s+] (N.Z.) mad, eccentric.
[1980s+] (N.Z.) to act sensibly.
[1950s] an excl. of annoyance, mind your own business! don’t interfere!; an angry retort telling somebody to calm down or suffer the consequences.
SE in slang uses
[1950s] a generally affectionate term of address.