The act of sneaking up on a man while at the urinal, gingerly placing one's hands on that man's shoulders like Xerxes did to Leonidas in the movie 300, and gently whispering "Xerxes," "Leonidas," or commenting on the man's equipment, i.e. "nice penis."
Last night at the bar, Dieter sneaked up on Geoffry while Geoffry was in the can and gave him the xerxes. A startled Geoffry thought it was another meat gazer
and splattered all over himself.