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1.
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
1 0
 
2.
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
1 1