Source : Webster's Revised Unabridged Dictionary (1913)

Saucily \Sau"ci*ly\, adv.
   In a saucy manner; impudently; with impertinent boldness.
   --Addison.

Source : WordNet®

saucily
     adv 1: in a perky manner; "stuck perkily, like a bustle on a
            woman's skirt" [syn: {perkily}]
     2: in an impudent or impertinent manner; "a lean, swarthy
        fellow was peering through the window, grinning
        impudently" [syn: {impertinently}, {pertly}, {freshly}, {impudently}]