The Collaborative International Dictionary of English v.0.48:
Disgusting \Dis*gust"ing\, a. That causes disgust; sickening; offensive; revolting. -- Dis*gust"ing*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
disgustingly adv 1: in a disgusting manner or to a disgusting degree; "the beggar was disgustingly filthy" [syn: disgustingly, distastefully, revoltingly, sickeningly]