Wordnet 3.0
NOUN (1)
1. 
 an informal expression for a mildly depressed state; 
- Example: "in the dumps"- Example: "have the mopes"[syn: dumps, mopes]
WordNet (r) 3.0 (2006):
mopes
    n 1: an informal expression for a mildly depressed state; "in
         the dumps"; "have the mopes" [syn: dumps, mopes]