The Seven Deadly Sins aren't in the Bible.  They're a Catholic creation.  (I'm Catholic) edit:  If you want to compare overeating to gluttony: St. Thomas Aquinas separated various categories of gluttony.  Nimis describes "eating too much."  The original definition of gluttony in the seven deadly sins and Catholicism referred only to consuming food to the detriment of the poor/starving.  Waste being the key determinant of the sin.  Its definition was expanded via St. Thomas Aquinas.