"I'm full as a tick"... "I'm fixing to bust open like a can of biscuits"... "I can't breath, if I take another bite I may explode...what's for dessert?" "I need a wheel barrow to haul myself (belly)out of here"... Favorite is when you climb back into a car after a huge meal and unbutton your pants and the only sound is a breath and a moan of release.