Muffins on Muffins is general "Prep" slang for Arguing over the same general principle, agreeing, and not realizing your both on the same side of the argument.

It was created in early 2005, and spread wildly through the east coast of the United States. It was mostly used by people tripping on acid at Techno gigs, who were arguing over pseudo-politics.
People who were also on "A" would call the two participating, "Arguing about Muffins on Muffins"


It has recently traveled to 4chan and Gaia.com, making it almost instantly to Netspeak status.