Gluttony, the act of eating to excess (either to discomfort or more than required for proper health).(noun)
Present participle of overeat.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "overeating" in a sentence
"Obviously, whether or not the overeating is a result of peer pressure, hunger (meal skipping), depression, binge-eating, olanzapine, sugar-addiction, MC-4 receptor defect, or a craniopharyngeoma may well influence the choice of treatments."
"According to the World Health Organization, overeating is "the fastest growing form of malnourishment" in the world."
"After several days of feeding the cats separately, I have concluded pretty conclusively that Lucy is not interested in overeating for food's sake."