3lb Gastric Orgasm Share definition Flag The very first flatulence passed during a day. Usually proceeding to the loss off 3lbs of gas weight. <Doug wakes up> <farts> George: Doug you just had your 3lb Gastric Orgasm. 3lb Gastric Orgasm by Certamon May 5, 2009 Get the 3lb Gastric Orgasm mug.