Simultaneously doing all bodily functions at the same time in a violent explosion. Including but not limited to: laughing, sneezing, coughing, hiccuping, blinking, farting, burping, pooping, peeing, popping a zit, sweating, having your period, acidic discharge, giving birth, lactating, sharting, hemoraging, salavating, vomiting, queefing, and ejaculating. Gigglyfloofing results in death 99.9% of the time. The only known person to survive a legit gigglyfloof is a Jewish Rabbi from Germany who was shot and killed two weeks later during the Nazi invasion of 1943. There are no know warning signs that a gigglyfloof is about to occur, except a sudden pause right before the explosion. Fat people are expecially prone to gigglyfloofs as they have extra pressure built up inside of them already.
She's about to gigglyfloof! Everybody hit the deck!!!!!