blue funk

from WordNet (r) 3.0 (2006)

blue funk
    n 1: a state of nervous depression; "he was in a funk" [syn:
         {funk}, {blue funk}]

from The Collaborative International Dictionary of English v.0.48

Funk \Funk\ (f[u^][ng]k), n. [OE. funke a little fire; akin to
   Prov. E. funk touchwood, G. funke spark, and perh. to Goth.
   f[=o]n fire.]
   1. An offensive smell; a stench. [Low]
      [1913 Webster]

   2. One who funks; a shirk; a coward. [Colloq.]
      [Webster 1913 Suppl.]

   3. a state of fear.
      [PJC]

   4. a mildly depressed state of mind; -- often used in the
      phrase {blue funk}.
      [PJC]