Rib.

About Rib

In professional wrestling, a rib is a prank played on a wrestler, or backstage employee of a wrestling promotion, by another wrestler. Ribs may be practiced as a form of stress relief from the grueling schedule of traveling, experiencing the physical exertion of wrestling, and sleeping in a different town most nights. The largest wrestling company, WWE, are reported to require their wrestlers to perform 4 nights per week, so the backstage environment can become tense and in need of the relief that could be found in ribbing.