If you say that someone overeats, you mean they eat more than they need to or more than is healthy.
例句
If you tend to overeat because of depression, first take steps to recognize the source of your sadness.如果你常常因為沮喪而暴飲暴食，首先應該設法找到悲傷的原因。...people who overeat spicy foods.辛辣食品吃得過多的人
英英詞典釋義
Noun
1. eating to excess (personified as one of the deadly sins)