look up any word, like wyd:
choosing an option that wasn't presented, whether that be on an actual menu or in other phases of life
I'm tired of this same old food. I'm going off-menu with this one. I want a Big Mac, but with only BBQ sauce, Onions, Lettuce and cheese.

Known versions of going off-menu include, but are not limited to: the McChurger & the McOctogon
by Insidivs February 02, 2010
Cheating on ones significant other
Dude 1: Can you believe Jesse James is going off-menu for Marilyn Manson?

Dude 2: Dude, apparently she lets him park his hot rod in her monster garage like 5 times more per week than Sandra Bullock.
by don't ask jeeves September 06, 2011