In cricket, a slider is a type of delivery bowled by a wrist spin bowler. Whereas a topspinner is released with the thumb facing the batsman, a slider is bowled with the thumb facing the bowler. On release the wrist and ring finger work to impart backspin on the ball. A topspinner tends to dip more quickly and bounce higher than a normal delivery. The slider does the opposite: it floats to a fuller length and bounces less than the batsman might expect.
The classic slider heads with its seam aligned towards the batsman and may tend to swing in slightly. Sliders may also head towards the batsman with a scrambled seam (with the ball not spinning in the direction of the seam, so the seam direction is not constant, unlike in conventional spin bowling). This has less effect on the flight and bounce but absence of leg spin may deceive the batsman. It is claimed that Shane Warne invented this type of delivery. However, this is inaccurate. The Australian spinner Peter Philpott used the technique in the 1960s, calling it simply an orthodox backspinner, while Australian allrounder and captain Richie Benaud used what he called his 'sliding topspinner' which appears again to have been similar. Since he was taught the technique by Doug Ring, it may be more accurate to suggest that Mr Ring is the originator. Either that, or the ball is one of those deliveries with no easy to identify point of origin.
The slider (a straight ball delivered from the front of the hand) is to be compared with the zooter (a straight ball delivered out of the back of the hand).