Source : Webster's Revised Unabridged Dictionary (1913)

Impudent \Im"pu*dent\, a. [L. impudens, -entis; pref. im- not +
   pudens ashamed, modest, p. pr. of pudere to feel shame: cf.
   F. impudent.]
   Bold, with contempt or disregard; unblushingly forward;
   impertinent; wanting modesty; shameless; saucy.

         More than impudent sauciness.            --Shak.

         When we behold an angel, not to fear Is to be impudent.
                                                  --Dryden.

   Syn: Shameless; audacious; brazen; bold-faced; pert;
        immodest; rude; saucy; impertinent; insolent.

Source : WordNet®

impudent
     adj 1: marked by casual disrespect; "a flip answer to serious
            question"; "the student was kept in for impudent
            behavior" [syn: {insolent}, {snotty-nosed}, {flip}]
     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}, {overbold}, {smart}, {saucy}, {sassy}]