kill time | kill an hour, a couple of hours, etc.idiomPart ofhourkill time | kill an hour, a couple of hours, etc.kill time | kill an hour, a couple of hours, etc. — idiomidiom1. To spend time doing unimportant things while waiting for something.1.idiomDefinitionTo spend time doing unimportant things while waiting for something.ExampleDiego killed time by reading a magazine at the airport.We killed a couple of hours playing video games before the movie.