Gluttony (Latin: gula, derived from the Latin gluttire meaning "to gulp down or swallow") means over-indulgence and over-consumption of food, drink, or wealth items, particularly as status symbols. In Christianity, it is considered a sin if the excessive desire for food causes it to be withheld from the needy.

Is gluttony a sin according to the Bible?

In the Bible, gluttony is closely linked with the sins of drunkenness, idolatry, lavishness, rebellion, disobedience, laziness, and wastefulness (Deuteronomy 21:20). The Bible condemns gluttony as a sin and places it squarely in “the lust of the flesh” camp (1 John 2:15–17).

Is it a sin to eat when you're not hungry?

There is no “sinful” food, He has made all food clean through Christ. Therefore enjoying food, fun food, dense food, all food does not constitute overeating, nor is it a sin. Eating past comfortable fullness in the context of recovering from an eating disorder/disordered eating.