dumps

from WordNet (r) 3.0 (2006)

dumps
    n 1: an informal expression for a mildly depressed state; "in
         the dumps"; "have the mopes" [syn: {dumps}, {mopes}]

from The Collaborative International Dictionary of English v.0.48

Dumps \Dumps\ (d[u^]mps), n. pl.
   a gloomy mental state; same as 2nd {dump[1]}; -- used mostly
   in the phrase "in the dumps".
   [PJC]

from Moby Thesaurus II by Grady Ward, 1.0

23 Moby Thesaurus words for "dumps":
      blahs, blue devils, blues, dejection, depression, dismals, dods,
      doldrums, dolefuls, dorts, frumps, gloom, grumps, heavyheartedness,
      megrims, melancholy, mopes, mulligrubs, mumps, pouts, sulks,
      sullens, unhappiness

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