1. (Noun) A facial feature wherein your lips tend to be abnormally moist with a greenish tint, usually from ingesting mucous deposits. That is a typical condition among young children, who experiment with actual excretions through flavor sensations. The situation often diminishes as we grow older, but persists among individuals with poor social skills.2. (Noun) An individual who uses mucous build up, frequently leading to residue upon the mouth.