Definitions
1.VerbTo carry oneself in a depressed, lackadaisical manner; to give oneself up to low spirits; to pout, sulk.
2.VerbTo make spiritless and stupid.
3.NounThe act of moping"When she gets upset, she has a little mope, and then gets over it."
4.NounA dull, spiritless person.
5.NounA 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.