Definition of "jitterbug"

(colloquial) A nervous or jittery person.  examples

(jazz) A jazz musician or aficionado.  examples

(dance) An uptempo jazz or swing dance which embellishes on the two-step pattern and frequently incorporates acrobatic style swing steps.  examples

Synonym of diddley bow (“type of stringed instrument”)  examples

To dance the jitterbug.  examples