wet elephant
The act of a man dipping his flaccid penis into a toilet bowl or cup containing a liquid, then slapping an unsuspecting person with it repeatedly, usually over the arm, leg, or shoulder. The receiver is usually sitting in a chair or couch, with their back turned to the giver.
Josh was so drunk at the party last night that he sneaked behind Jennifer while she was sitting on the couch, dipped his penis into her beer glass, and gave her a wet elephant on the arm.