late 18th century, in the context of piracy: to walk along a plank placed over the side of a ship until one falls into the sea—hence, figuratively, early 19th century: to be forced to resign from one’s office or position
a game in which players must obey a leader’s instructions if, but only if, they are prefaced with the words ‘O’Grady says’—UK, 1917—game invented during World War One as a play-way for conducting physical exercises and drill in the British Army
literally (1845): an enclosure in which calves are isolated from their mothers until weaned—figuratively, humorously and offensively (1885): a girls’ boarding-school—similar to the use of ‘cow’ to derogatorily designate a girl or woman
Australia—‘the block’: a street or area in a city or town in which it is fashionable to promenade—‘to do the block’: to promenade in such a street or area—1868, in reference to a section of Collins Street in Melbourne
is used of a place that is found inexplicably deserted; also of a person’s sudden and inexplicable disappearance—alludes to the Mary Celeste, a U.S. cargo ship which in December 1872 was found mysteriously abandoned in the North Atlantic
USA—1941 (slang of the Marines): a state of disorder or confusion—1959 (High-School slang): a prank in which the occupants of a vehicle which has temporarily come to a stop must jump out, run around the vehicle and get back in
to promote somebody to an ostensibly higher position where they will be out of the way and less influential—jocular variant of ‘to kick somebody downstairs’, meaning to eject somebody