An alternate name for Jack in the Box which refers to the addictive nature of it's food, widely thought to have addictive substances infused in their burgers/tacos. Open 24 Hours. Widely blamed as the source of over 50% of DUI's ever gotten.
Drunk guy 1: Dude i'm so fucking starving right now.

Drunk guy 2: I am going to fucking murder someone if i dont get some Jack in the Crack right this very minute.
by AJ_Arch July 10, 2008
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The explosive diarrhea that ensues the morning after a late-night Jack in the Box run, due to the copious amounts of cat food and grease in their tacos and burgers
Brah, I was so faded last night and got 99 tacos for two cents at Jack in the Box, now I've got jack in the crack
by flossangeles December 18, 2009
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a totally douchey way of saying jack in the box, sometimes that "x" sound in "box" is too hard for people to pronounce, so they just go with the least funny alternative.
Jack: Hey Jill, Let's go to Jack in the Crack
Jill: What, are you retarded? It's Jack in the Box, that's the name of the eating establishment, and if you respect them or enjoy their food in the least bit you could refer to them by their actual name, or at least a more respectable, less douchey alternative. Dumbass.
Jack: I am sorry. I will never say Jack in the Crack again.
by poopzone November 27, 2007
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