a casino game played by two people (usually bored Navy Sailors) concerning a 12 inch standard wood ruler. The participants drop their particular pants and sit butt to butt. They then each place the opposing finishes associated with ruler to the crack of the ass and clench butt cheeks firmly. The participants after that shuffle from one another while attempting to keep ownership of this ruler. The person who retains possession of ruler by clenching and shuffling wins that round of Butt Tug.