1. in. [for a person] to be up to date and modern. Tom really swings. Look at those blue suede shoes!
2. in. [for a party or other event] to be fun or exciting. I’ve never been to a gathering that swings like this one.
3. in. to be involved in sexual fads, group sex, or the swapping of sexual partners. Carol says that Tom, Ted, and Heidi swing. How does she know?
4. tv. to bring something off; to execute a deal. They want to elect me president of the club. I hope they can swing it.