I. ˈji-tər-ˌbəg noun
Date: 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
II. intransitive verb
Date: 1939
1. : to dance the jitterbug
2. : to move around or back and forth with quick often jerky movements especially to confuse or disconcert an opponent in sports