Food is coming out of my mouth

An exaggerative term used when a person has eaten large amounts of food and is more than just a bit full but very full and couldn't dare eat anything else.

Idiom; Refers to the exaggeration of when a person is so full that the stomach physically has no space left for the food to go and the food is piling back up the oesophagus and coming back out of the mouth and throat due to no physical place for the food to go. This is not a literal term but rather an exaggeration for being extremely full and unable to eat anything else.

Person 1: Hey, do you want this last piece of cake?
Person 2: No thanks, I've already had a massive pizza already and I'm so full that food is coming out of my mouth. No way can I eat anything else. But thanks anyway.