[jit.ter.bug] n (1938) 1: a jazz variation of the two-step in which couples swing, balance, and twirl in standardized patterns and often with vigorous acrobatics
2: one who dances the jitterbug
[2]jitterbug vi (1939) 1: to dance the jitterbug
2: to move around or back and forth with quick often jerky movements esp. to confuse or disconcert an opponent in sports