a police patrol car—UK, 1959—originally any of the special crime police patrol cars used in Lancashire—from the radio call-sign ‘Z’ allotted to such cars—popularised by the British television series ‘Z Cars’ (1962-78)
Australia, 1906; New Zealand, 1918—a medic, paramedic or first-aid worker, especially when in attendance at a sporting event—from the proprietary name of a popular brand of antiseptic ointment
U.S. College slang, 1972—a drinking game in which players attempt to throw ping-pong balls into cups of beer, which must then be drunk by their opponents—from ‘beer’ and the second element of ‘ping-pong’
the killing of a woman or girl by a man—French ‘femmicide’: 1839; 1854 in the sense of a man who has killed a woman—English ‘femicide’: 1801; 1827 in the sense of a man who has killed a woman
USA, 1931—indicates that something has been formulated or devised hurriedly, roughly or carelessly, as though sketched or scribbled on the back of an envelope
Yorkshire & Lancashire (northern England), first half of the 19th century—the evening of 30th April (May Eve), on which people traditionally indulged in mischievous pranks
USA, 1972—indicates that something has been formulated or devised hurriedly, roughly or carelessly, as though sketched or scribbled on the back of a napkin—also with ‘cocktail napkin’