From Longman Dictionary of Contemporary Englishgonergon‧er /ˈɡɒnə $ ˈɡɒːnər/ noun informal → be a goner
Examples from the Corpus
goner• It was past it, a goner, way past its sell-by date.• Suffice to say keep your skis parallel or you're a goner.• When one of the plane's engines went out, I thought I was a goner.• In 1995, Major again appeared to be a political goner when inner-party squabbling threatened to bring his government down.Origin goner (1800-1900) gone 