Made famous by Dan Brown's book "The Da Vinci Code". The orginization was created as a fraud in the late 1960s, though it continues to exist as a myth.
"Did you know Isaac Newton led the Priory of Sion"
"Dude, that ain't real"
A donut hole, sold at Dunkin Donuts in boxes of twenty.
"Hand me a munchkin, I've got the munchies"