to repeatedly have the same argument over and over again. used in place of the out of date phrase "beating a dead horse"

origin - Sex columnist Dan Savage regularly blogs his opinion that 'all pit bulls should be boiled alive and fed to their idiot owners'. These posts regularly incite repetitive arguments among commenters.
"Oh man, Max and Martha are having their honeycrisp versus fuji argument again. Those two really know how to boil a dead dog."
by painausten February 21, 2008
Get the boil a dead dog mug.