A phrase used to describe an action which would negatively stress ones digestive system, so much so, that one wonders if they might have ruptured an internal organ. The "gizzard" being used to describe an organ within ones digestive system (gall bladder, stomach, intestines, bowel, etc). This phrase being most commonly used to refer to something that would result in severe explosive diarrhea or a massive increase in stool output.
Friend 1: "Damn these chocolate covered fiber pellet snacks are tasty!"
Friend 2: "Yo, holy crap, you ate half a box of super fiber pellet snacks! You better slow it down man, otherwise you are bound to pop a gizzard eating all that fiber in one sitting"
A one-man dance move in which the dancer keeps his feet stationary and bends as far back as possible while moving arms, head and torso festively. Performed almost exclusively by men in New Orleans during Mardi Gras parades, particularly when a woman is shaking her behind.
Look at that girl shakin' her ass! I'ma pop a gator!! Who dat?!