Occurs at the end of a double date between two males and two females. If one male is dissed or not engaged by his female and leaves, the other male can try to entertain and satisfy both females by getting them to have sex with him in the shower. Derived from Power Play as in Hockey.
When Ted left after being told Melissa wasn't attracted to him, Bobby knew that Melissa and Stacy were on the Shower Play.
by Auxirock January 1, 2012