adj. Referring to a set of rules and customs that have been followed since the days of yore, or possibly pre-yore.
Real citation: "@zuhl So true. Unless you do like I do and bake it on a cookie sheet. Oh yeah, there's a way around the no-pantsless-bacon-preparation rule!"
(June 21, 2009, Wry Redhead, Twitter, http://twitter.com/wryredhead/status/2268710187)
Made-up citation: "Perhaps if the Biblical guidelines regarding no-pantsless-bacon-preparation procedures were followed more rigorously, the a-pork-alypse could have been averted. Alas!"