The act of receiving oral while wearing any item of swag (small wreath, holly, seasonal coniferous decor, etc.)
Once the tree was decorated to a jolly perfection, the spiked nog started to kick in and next thing you know she was gag-swagging my candy cane like one sexy ass elf.
Gag collar is used to make someone gag. Usually when having sex and you wanna make the person gag. Gaging is normal we do it when we throw up or don't like something.
Boy 1: I put a gag collar on Alexandra, she gaged so much that It became her favorite toy!