On no less than FIVE websites this morning, I have read comments or recaps from people that have no idea what a popcorn fart is. This amazes me. Maybe it is a southern thing. Popcorn fart has two possible meanings:
a) a small or petite person, "She's a little popcorn fart." b) an insignificant person or event, "he/she/it don't amount to a popcorn fart in a hurricane."