The Collaborative International Dictionary of English v.0.48:

Displume \Dis*plume"\, v. t. [imp. & p. p. Displumed; p. pr. &
   vb. n. Displuming.] [Pref. dis- + plume: cf. OF. desplumer,
   F. d['e]plumer.]
   To strip of, or as of, a plume, or plumes; to deprive of
   decoration; to dishonor; to degrade.
   [1913 Webster]

         Displumed, degraded, and metamorphosed.  --Burke.
   [1913 Webster]

WordNet (r) 3.0 (2006):

displume
    v 1: strip of honors, possessions, or attributes [syn:
         deplume, displume]
    2: strip of feathers; "pull a chicken"; "pluck the capon" [syn:
       pluck, pull, tear, deplume, deplumate, displume]