Jack Crap Share definition Flag A substitute for "Jack Shit", used by your really Christian boss when God is watching him. "Pardon my French, but that lady from Microsoft doesn't know JACK CRAP!!" Jack Crap by Wilford Brimley's stache October 16, 2008 0 0 Get merch Get the Jack Crap mug. Buy Now — $32.95 See more merch