What does boil a dead dog mean?

boil a dead dog meaning in Urban Dictionary

to over and over repeatedly have the same argument over and over again. found in place of the outdated term "beating a dead horse"origin - Intercourse columnist Dan Savage on a regular basis blogs their opinion that 'all pit bull terriers ought to be boiled live and fed with their idiot proprietors'. These articles on a regular basis incite repetitive arguments among commenters.