In cricket, a yorker is a ball bowled which bounces by the batter's feet. This length makes it very challenging for a batter to play the ball.
Chris Schofield being bowled by a yorker
Yorkers are very difficult to play. Here a batter defends against one in the nets.
In cricket, a crease is a white line painted or chalked on the field of play, that defines the area within which the batters and bowlers operate. The term crease may also be used to refer to the recta
Yorker
…challenging for a batter to play the ball. When a batter assumes a normal stance, a yorker generally bounces on the cricket pitch on or near the batter's popping crease. A batter who advances down the pitch to strike the ball (typically to spin bowlers) may by so advancing cause the ball to pitch (or land) at or around…
The white crease lines at one end of a cricket pitch.
The groundsman on the right paints the popping crease.
The popping crease is visible here, with England's Marcus Trescothick playing a shot that has involved him moving forward over his own crease to intercept the ball. In taking a successful run, he must ground his bat behind the corresponding crease at the other end of the pitch, and his batting partner must in turn ground himself behind Trescothick's crease. Should Trescothick have ventured beyond his crease in playing his shot, he risked being stumped.
Jim Allenby bowling; he must ground some part of his foot behind his popping crease and within the return creases for the ball to be a legal delivery. As a member of the fielding side, he can also – after delivering the ball – attempt to run out a batsman by breaking the stumps with the ball before the batsman manages to return to the popping crease.