Etymology
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callithumpian (adj.)
"pertaining to a noisy concert or serenade," also the name of the concert itself, 1836, U.S. colloquial, probably a fanciful construction (perhaps based on the calli- "beauty" words (see Callisto) + thump). But Wright's "English Dialect Dictionary" (1900) reports Gallithumpians as a Dorset and Devon word from 1790s for a society of radical social reformers, and also in reference to "noisy disturbers of elections and meetings" (1770s). The U.S. reference is most commonly "a band of discordant instruments" or a crowd banging on tin pots and pans, blowing horns, etc., especially on New Year's or to "serenade" a newlywed couple to show disapproval of one or the other or the match.
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charivari (n.)

"rough music, a mock-serenade intended as annoyance or insult," especially as a community way of expressing disapproval of a marriage match, 1735, from French charivari, from Old French chalivali "discordant noise made by pots and pans" (14c.), from Late Latin caribaria "a severe headache," from Greek karebaria "headache," from kare "head" (from PIE root *ker- (1) "horn; head") + barys "heavy," from PIE root *gwere- (1) "heavy." Compare callithumpian.

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