A fork of Rural Dictionary
based on the ads for Diamond Shreddies, it means to argue over things that are basically the same.
"Dude, that's a circle," "Naw man, it's an oval!" " Oh, come on stop fighting over shreddies!" "Is that a husky-terrier, or a husky-poodle?" "Dude, it's a dog, don't fight over shreddies."