The Collaborative International Dictionary of English v.0.48:
Giddily \Gid"di*ly\, adv. In a giddy manner. [1913 Webster]WordNet (r) 3.0 (2006):
giddily adv 1: in a giddy light-headed manner; "he walked around dizzily" [syn: dizzily, giddily, light-headedly]