not working very hard at your job, because you are just waiting until you reach the age at which you can stop work

He's a time-serving drone who works for America's Internal Revenue Service. 他是个得过且过的懒汉，在美国国税局工作。

These time-serving workers are not delivering improved standards. 这些得过且过的工人表现并没有什么提高。

changing your ideas and opinions in order to make them more like those that are held by people in power, especially because you believe it will be to your advantage

time-serving politicians 趋炎附势的政客

He is a corrupt, time-serving career man. 他是一个腐败的、曲意逢迎的职场中人。