(copy and pasted from Wiki, because…well..the title says it all really, hope you had a lovely Christmas and got totally food drunk)
The phrase was echoed by Dr J E Rullfson of Toledo after fasting for sixty days from January 5, 1907. He holds that the entire human race is food drunk, saying “the dinner eaten by Napoleon just before the battle of Leipsic proved so indigestible that the monarch’s brain was clouded and as a result the battle was lost and a pie which King Philip failed to digest caused the revolt of the Netherlands.”
The state of being food drunken
When people overeat, their bodies have the tendency to chemically change including metabolic shifts. There are also electrolyte imbalances due to the process of digestion that occur once the massive amounts of food have entered the body. This can also cause a feeling of depression, emotional attachment to food, fatigue, and even boredom.