Phrase used to mock someone, usually an oponent, after they are beaten by an amazing display of skill in a sport, video game, competition, etc.
Refering to the "opponent" being so shocked and/or amazed as to have shit himself/herself
*lacrosse player with the ball jukes right, behind-the-back-split- dodges to the left, leaving his defense man lying on the ground in the wrong direction, and he rips a shot in the corner unopposed.