luncheonからの略。語源は不明だが、おそらくlump, lump of foodから。bump,lunch,hump,hunchと比較される。 原語の意味は、パンやスナック菓子など、一日のうちいつでも食べられる小さな食べ物の切れ端だったが、20世紀に入って徐々に昼食に意味が固定されていった。breakfast,dinnerと比較。
PRATTLE. I always to be ?ure, makes a point to keep up the dignity of the family I lives in. Wou'd you take a more ?olid refre?hment?--Have you lunch'd, Mr. Bribe?But as late as 1817 the only definition of lunch in Webster's is "a large piece of food." OED says in 1820s the word "was regarded either as a vulgarism, or as a fashionable affectation." Related: Lunched; lunching. Lunch money is attested from 1868; lunch-time (n.) is from 1821; lunch hour is from 1840. Slang phrase out to lunch "insane, stupid, clueless" first recorded 1955, on notion of being "not there." Old English had nonmete "afternoon meal," literally "noon-meat."
BRIBE. Lunch'd O dear! Permit me, my dear Mrs. Prattle, to refre?h my sponge, upon the honey dew that clings to your ravi?hing pouters. O! Mrs. Prattle, this ?hall be my lunch. (ki??es)
["The Mode," in William Davies' "Plays Written for a Private Theatre," London, 1786]