Source : Webster's Revised Unabridged Dictionary (1913)

Scandalously \Scan"dal*ous*ly\, adv.
   1. In a manner to give offense; shamefully.

            His discourse at table was scandalously unbecoming
            the dignity of his station.           --Swift.

   2. With a disposition to impute immorality or wrong.

            Shun their fault, who, scandalously nice, Will needs
            mistake an author into vice.          --Pope.

Source : WordNet®

scandalously
     adv : in a scandalous manner; "you behaved scandalously when you
           walked out of that meeting!"