mockingly

from WordNet (r) 3.0 (2006)

mockingly
    adv 1: in a disrespectful jeering manner [syn: {jeeringly},
           {mockingly}, {gibingly}]
    2: in a disrespectful and mocking manner; "`Sorry,' she repeated
       derisively" [syn: {derisively}, {scoffingly}, {derisorily},
       {mockingly}]

from The Collaborative International Dictionary of English v.0.48

Mockingly \Mock"ing*ly\, adv.
   By way of derision; in a contemptuous or mocking manner.
   [1913 Webster]