Eating too much; overeating—consuming more food than is needed, which can cause discomfort or weight gain.
連休中に食べ過ぎてしまい、体重が増えた。
I overate during the holiday and gained weight.
食べ過ぎでお腹が痛くなった。
My stomach hurt from overeating.
ダイエット中は食べ過ぎに注意してください。
Be careful not to overeat while dieting.