The Collaborative International Dictionary of English v.0.48:
Scoffingly \Scoff"ing*ly\, adv. In a scoffing manner. --Broome. [1913 Webster]WordNet (r) 3.0 (2006):
scoffingly adv 1: in a disrespectful and mocking manner; "`Sorry,' she repeated derisively" [syn: derisively, scoffingly, derisorily, mockingly]