The Collaborative International Dictionary of English v.0.48:

Bedizen \Be*diz"en\, v. t.
   To dress or adorn tawdrily or with false taste.
   [1913 Webster]

         Remnants of tapestried hangings, . . . and shreds of
         pictures with which he had bedizened his tatters. --Sir
                                                  W. Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bedizen
    v 1: decorate tastelessly
    2: dress up garishly and tastelessly [syn: bedizen, dizen]