The Collaborative International Dictionary of English v.0.48:

Light-foot \Light"-foot`\ (l[imac]t"f[oo^]t`), Light-footed
\Light"-foot`ed\, a.
   Having a light, springy step; moving lightly and nimbly;
   nimble in running or dancing; active; as, light-foot Iris.
   Opposite of heavy-footed. --Tennyson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

light-footed
    adj 1: (of movement) having a light and springy step; "a light-
           footed girl" [ant: heavy-footed]