/swing"euhr/ , n.
1. a person or thing that swings.
2. Slang. a lively, active, and modern person whose activities are fashionable or trendy.
3. Slang.
a. a person who indulges in promiscuous sex.
b. a person who engages in the exchanging of spouses for sexual activities.
[ 1535-45 for def. 1; 1955-60 for def. 2; SWING 1 + -ER 1 ]