Word Origin & History
"lavatory," 1940, but perhaps 1922, probably from Fr. lieux d'aisances, "lavatory," lit. "place of ease," picked up by British servicemen in France during World War I. Or possibly a pun on Waterloo, based on water closet.
"type of card game," 1675, short for lanterloo, from Fr. lanturelau, originally the refrain of a song.