kiss something goodbye | kiss goodbye to somethingidiomPart ofgoodbyekiss something goodbye | kiss goodbye to somethingkiss something goodbye | kiss goodbye to something — idiomidiom1. To accept that you will lose something or not be able to do it.1.idiomDefinitionTo accept that you will lose something or not be able to do it.ExampleAfter losing his job, Tom kissed his vacation plans goodbye.If you don't study, you can kiss goodbye to a good grade.