swing man—
1. a musician who plays jazz with a swing—a style with a flowing but strongly compelling rhythm:
- The best alto player among the swingmen was Johnny Hodges.
2. (U.S.) the mounted herdsman who keeps a moving herd of cattle in order:
- The herd trailed along behind the leaders … guarded by outriders, known as swing men.
3. (sl.) a drug supplier:
- Now he [pusher] is called the connection, the bagman, the swing man, the dealer.
swing voter—(U.S.) the independent voter that often decisively influences the result of a ballot:
- He is expected to join Mr. Daane as a “swing voter,” leaving Mr. Martin with only one conservative colleague.