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
Get a Jack in the Crack mug for your cousin Callisto.
O-dog: "aw y'all niggas goin to jack-in-the-crack?"
Harold: "hell yea.. hell yea."
by FlyAway July 20, 2011
Get the jack-in-the-crack neck gaiter and mug.
Submitting this because all the definitions are wrong. This term originated back in the 90's when Jack in the Box made national news from a bunch of stores getting people sick with E. Coli bacteria, which is basically from shit contamination. Hence, Jack in the Crack was born.
by Jathra September 25, 2020
Get a jack in the crack mug for your buddy Rihanna.
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
Get a jack in the crack mug for your bunkmate Manley.