To carry oneself in a depressed, lackadaisical manner; to give oneself up to low spirits; to pout, sulk.
To make spiritless and stupid.
A bottom feeder who "mopes" around a pornography studio hoping for his big break and often does bit parts in exchange for room and board and meager pay.
The act of moping
One with strong moral views against excessive consumption of alcohol, gambling, pornography, etc., who seeks to promulgate those views.