niet op

listen to the pronunciation of niet op
Нидерландский Язык - Английский Язык
not up
An umpire's call that signifies a ball has bounced twice and is, therefore, dead
The expression used to indicate that the ball has not been struck in accordance with the rules "Not up" applies when 1) the ball is not struck correctly by the server or striker, 2) the ball bounces more than once upon the floor before being struck by the striker, 3) the ball touches the striker or anything that he wears or carries other than his racket, 4) the server makes an attempt but fails to strike the ball ("Not up" is also a Marker's call)
Said of a ball that is hit just as it's bouncing for the second time Results in loss of point