reverse gag 

When you feel sick but can't throw up. You then stick your finger in your ass and reverse gag yourself to make you shit and feel better.

I was so hung over yesterday that I gave myself the ole reverse gag and was feeling better in no time.

reverse gag by skankweasel October 6, 2016

reverse ball gag 

A method for holding in a poop that is very persistent that utalizes the seatbelt and a tennis ball. When you feel a poop coming on, place a tennis ball directly under your butthole, next put on your seat belt and pull it tight, this will cause you to be pulled down onto the tennis ball whilst sitting in your seat thus plugging your butt hole and keeping your shorts clean from invasive poop.

Heading off shore twenty miles, Brian felt the second wave of troops coming to destroy his short pants so he strapped on the reverse ball gag.

reverse ball gag by Oh Billy, Gary, Reggie February 11, 2018