a person or thing who wastes something

He's a time waster. 他是个浪费时间的人。

This project is nothing but a money waster. 这个项目就是在烧钱。

a person who does nothing positive with their life, making no use of their abilities or the opportunities that are offered to them

There were the usual bunch of wasters hanging round the bar. 那群混混又在那家酒吧里闲呆着。