mope

Short definition from Wiktionary

Verb

1. 1
   To carry oneself in a depressed, lackadaisical manner; to give oneself up to low spirits; to pout, sulk.
2. 2
   To make spiritless and stupid.

Noun

1. 1
   The act of moping
2. 2
   A dull, spiritless person.
3. 3
   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.