tachyphagia, tachyphagy 1. Rapid or hasty eating; seen in some forms of regressed schizophrenia. 2. Food-grabbing; extreme rapidity of eating. It is commonly seen in regressed, deteriorated schizophrenics, and often such patients will grab any object, edible or not, put it into the mouth, and swallow it.tachyphagia, tachyphagous, tachyphagy Extremely or excessively fast eating; the bolting or gobbling down of food.