Source : Webster's Revised Unabridged Dictionary (1913)

Shabbily \Shab"bi*ly\, adv.
   In a shabby manner.

Source : WordNet®

shabbily
     adv 1: so as to appear worn and threadbare or dilapidated; "a
            shabbily dressed man"
     2: in a mean and ungenerous manner; "the two were haggling
        shabbily in the drawing-room"