Source : Webster's Revised Unabridged Dictionary (1913)

Saucy \Sau"cy\, a. [Compar. {Saucier}; superl. {Sauciest}.]
   [From {Sauce}.]
   1. Showing impertinent boldness or pertness; transgressing
      the rules of decorum; treating superiors with contempt;
      impudent; insolent; as, a saucy fellow.

            Am I not protector, saucy priest?     --Shak.

   2. Expressive of, or characterized by, impudence;
      impertinent; as, a saucy eye; saucy looks.

            We then have done you bold and saucy wrongs. --Shak.

   Syn: Impudent; insolent; impertinent; rude.

Source : WordNet®

saucy
     adj 1: characterized by a lightly pert and exuberant quality; "a
            certain irreverent gaiety and ease of manner" [syn: {impertinent},
             {irreverent}, {pert}]
     2: improperly forward or bold; "don't be fresh with me";
        "impertinent of a child to lecture a grownup"; "an
        impudent boy given to insulting strangers" [syn: {fresh},
        {impertinent}, {impudent}, {overbold}, {smart}, {sassy}]
     [also: {sauciest}, {saucier}]