1. 
2. 
[syn: foully, insultingly]
The Collaborative International Dictionary of English v.0.48:
Insulting \In*sult"ing\, a.
   Containing, or characterized by, insult or abuse; tending to
   insult or affront; as, insulting language, treatment, etc. --
   In*sult"ing*ly, adv.
   Syn: Insolent; impertinent; saucy; rude; abusive;
        contemptuous. See Insolent.
        [1913 Webster]
WordNet (r) 3.0 (2006):
insultingly
    adv 1: in a disrespectful and insulting manner; "he behaves
           insultingly toward his parents"
    2: in an unfair and insulting manner; "this internationally
       known writer was foully condemned by the Muslim
       fundamentalists" [syn: foully, insultingly]