jitterbug (n.)

popular type of fast swing dance, 1938, American English, from "Jitter Bug," title of a song recorded by Cab Calloway in 1934. Probably the literal sense is "one who has the jitters" (see jitters; for second element see bug (n.) in the slang "person obsessed with" sense). Another sense current about this time was "swing music enthusiast" (1937). As a verb from 1938.

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