The act of folding a woman up to make them look like a piece of popcorn, pouring caramel on their jugs, putting them in a barrel, and rolling them down a hill. Best done in the cold, to let the caramel harden and resemble a piece of Cracker-jack popcorn.
Gay man 1: I got so high off cat piss, I pulled off a Cracker-Jack Barrel Rack on this one dude.
Gay man 2: Yeah, that was me.
When you use a word or term you don't really know, kinda superficially.
Jim subscribes to dictionary.com's twitter, and he's always Cracker-jacking-it (the words) at me.