I wouldn't piss on someone if they were on fire

English Phrase phr en informal vulgar Expresses great contempt and loathing for someone. en 1937 Djuna Barnes Nightwood 106 I wouldn't piss on her if she were on fire! en 2007 Joseph Mahmough Be That As It May: Don't Worry About Things You Can't Change 85 I wouldn't piss on her if she was on fire. en 2011 William W. Johnstone; J. A. Johnstone A Good Day to Die 322 I wouldn't piss on him if he was on fire. References 1992, Eric Partridge, Paul Beale, A Dictionary of Catch Phrases, American and British