USA & UK, 1995—to take a pregnancy test of a type involving urinating on a disposable plastic stick which immediately indicates the result—also, more generally: to take any of various other diagnostic tests of this type
UK, 1911—a sharp blow to the back of the neck—refers to the practice of killing rabbits in this way, and originated in boxing—Australia, 1913: ‘rabbit killer’, also ‘rabbit-killer punch’
a person exercising an insidious or corrupting influence, especially over a ruler, government, etc.—UK, 1917—refers to Grigori Efimovich Rasputin (circa 1869-1916), mystic and influential favourite at the court of Tsar Nicholas II
UK, 1923—the north-east corner of Hyde Park, London, near Marble Arch, where public speaking and debate are traditionally permitted with minimal restriction—by extension: any location where public speaking and debate are permitted or encouraged
wealth gained in one generation of a family will be lost by the third generation—USA, 1874—refers to a hard-working man wearing a shirt with nothing over it
wealth gained in one generation of a family will be lost by the third generation—UK, 1842, as “there is but one generation in Lancashire between clog and clog”—refers to clogs being typically worn by factory workers