卖关子

卖关子

Literally means:

deliberately keep people guessing

Actually means:

keep people in suspense

It means in order to make others satisfy one's demand, he would stop at a critical moment when speaking or acting to keep people in anxiety and suspense.

为了使对方答应自己的要求，在说话，做事的关键地方故意搞花样使人不知道接下去的是什么，让对方着急。