gluttonous

1. Given to or marked by gluttony.
2. Indulging in something, such as an activity, to excess; voracious. See synonyms at voracious.

adjective

1. Wanting to eat or drink more than one can reasonably consume: edacious, greedy, hoggish, piggish, ravenous, voracious. See desire, ingestion.
2. Having an insatiable appetite for an activity or pursuit: avid, edacious, greedy, omnivorous, rapacious, ravenous, unappeasable, voracious. See desire.

Definition: greedy
Antonyms: abstemious, moderate

The adjective has one meaning:

Meaning #1: given to excess in consumption of especially food or drink
  Antonym: abstemious (meaning #1)