the Itis means: You feel tired after eating a lot of food. (in Community Dictionary, added by Leland Howe)

What else does the Itis mean?

  • After eating satisfying meals, you may feel drained and unwell. Foods high in carbohydrate and meats that contain the amino acid tryptophan are particularly susceptible to this phenomenon. (in Community Dictionary, added by Juliana Riddle)