USA 1813—a heavy metal ball secured by a chain to a person’s leg to prevent escape or as a punishment—figuratively, mid-19th century: anything seen as a heavy restraint, especially the matrimonial bonds
to put someone in a difficult, vulnerable or compromising situation, especially by exposing them to blame—USA, 1945, sports—the image is of suspending wet washing in the open so that it can dry
British, colloquial: a period during which an employee who is about to leave a company continues to receive a salary and in return agrees not to work for anyone else—origin, British Army: a paid leave between the end of one posting and the beginning of another
also ‘to drop one’s h’s’—not to pronounce the letter h at the beginning of words in which it is pronounced in standard English—1855—1847 as ‘not to sound one’s h’s’
a gesture (made by a French person to deny responsibility, knowledge or agreement) consisting typically in shrugging one’s shoulders while upturning one’s hands
to discuss an essentially private matter, especially a dispute or scandal, in public—UK, 1819—loan translation from French ‘laver son linge sale en public’, originated by Napoléon Bonaparte in 1814
an impressive facade or show designed to hide an embarrassing or shabby fact or condition—1843—from the sham villages said to have been built by Grigori Potemkin to deceive Catherine II
a box in which a young woman stores clothes and household articles in preparation for her marriage—Australia, 1902—perhaps related to the British ‘glory hole’, denoting a place for storing odds and ends