Source : Webster's Revised Unabridged Dictionary (1913)

Despicableness \Des"pi*ca*ble*ness\, n.
   The quality of being despicable; meanness; vileness;
   worthlessness.

Source : WordNet®

despicableness
     n : unworthiness by virtue of lacking higher values [syn: {baseness},
          {contemptibility}, {despicability}]