to surprise (someone); to introduce (to someone) something unexpected, underhand or requiring a quick reaction or correction.
Used other than figuratively or idiomatically: see bowl, googly.
To play the ball in an unexpected direction, forcing (the opponent) to change direction suddenly.
To cause a competitor to move or put weight on the wrong foot, as by making an unexpected move.
To place (someone) at a tactical disadvantage.
To catch (someone) off balance, off guard.