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It's the real moniker of the somehow popular restaruant "Jack in the Box", derived from the sickening feeling you get after eating their ground horse ass. Some of their food is less vile than others, but NOTHING on the menu is legit, especially the value menu, which, when eaten, will always have a few "surprises" in the meat IE: bone, sinew, and cartilage from god knows what animals.
I was eating my hamburger delux and heard a CRUNCH and noticed the meat was filled with cartilage, and I Gagged in the Bag.

(for UD's stupid requirements that my example match word for word gag in a bag)
by ganjboy420yaa September 10, 2008
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