Undercutter
The undercutter is a delivery bowled by a finger spin bowler in cricket. It is delivered with the arm tilted in such a way that the palm of the bowling hand is facing the sky at point of release. The ball will then be release with a horizontal side spin instead of the orthodox clockwise spin that the stock delivery is released with. This unique angle of spin will cause the ball to swerve sideways due to the magnus force in a similar manner to the drift produced on the stock delivery, but instead of turning, the ball will continue on its path.
Read more about this topic: Finger Spin