The Collaborative International Dictionary of English v.0.48:

Dallier \Dal"li*er\, n.
   One who fondles; a trifler; as, dalliers with pleasant words.
   --Asham.
   [1913 Webster] dallis grass

WordNet (r) 3.0 (2006):

dallier
    n 1: someone who wastes time [syn: dallier, dillydallier,
         dilly-dallier, mope, lounger]