Australia, 1948—a period allocated for private conversation, especially between women on isolated stations, over an outback radio network—by extension (1967): any long chat—‘galah’: a very common Australian cockatoo
New Zealand, 1970—at full speed—perhaps after ‘flat out’ (i.e., with the maximum speed or effort) and after ‘quicksticks’ (i.e., quickly, without delay)
British slang, 1960s—‘to disappear up one’s own arse’: to become self-involved, pretentious or conceited—‘to be up one’s own arse’: to be self-involved, pretentious or conceited
Australia, 1950—UK, 1962—derogatory and offensive: a middle-aged or elderly woman, especially one who is unattractive or unfeminine—refers to ‘boiler’, i.e., a tough old chicken for cooking by boiling