Source : Webster's Revised Unabridged Dictionary (1913)

Kiddy \Kid"dy\, v. t.
   To deceive; to outwit; to hoax. [Slang] --Dickens.

Kiddy \Kid"dy\, n.
   A young fellow; formerly, a low thief. [Slang, Eng.]

Source : WordNet®

kiddy
     n : a young child