The Collaborative International Dictionary of English v.0.48:

grotesquery \gro*tesqu"er*y\, n. [Written also grotesquerie.]
   [From Grotesque.]
   Grotesque action, speech, or manners; grotesque doings;
   ludicrous or incongruous unnaturalness or distortion. "The
   sustained grotesquery of Feather-top." --K. L. Bates.

   Syn: grotesqueness.
        [Webster 1913 Suppl. + WordNet 1.5]

              Vileness, on the other hand, becomes grotesquerie,
              wonderfully converted into a subject of laughter.
                                                  --George
                                                  Gissing.
        [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

grotesquerie
    n 1: ludicrous or incongruous unnaturalness or distortion [syn:
         grotesqueness, grotesquery, grotesquerie]