be banging, etc. your head against a brick wallidiomPart ofbrickbe banging, etc. your head against a brick wallbe banging, etc. your head against a brick wall — idiomidiom1. To keep trying to do something that will never succeed.1.idiomDefinitionTo keep trying to do something that will never succeed.ExampleMia felt she was banging her head against a brick wall.Is he still banging his head against a brick wall?