Source : Webster's Revised Unabridged Dictionary (1913)

Shill-I-shall-I \Shill"-I-shall`-I\, Shilly-shally
\Shil"ly-shal`ly\, adv. [A reduplication of shall I.]
   In an irresolute, undecided, or hesitating manner.

         I am somewhat dainty in making a resolution, because
         when I make it, I keep it; I don't stand
         shill-I-shall-I then; if I say 't, I'll do 't.
                                                  --Congreve.

Shilly-shally \Shil"ly-shal`ly\, v. i.
   To hesitate; to act in an irresolute manner; hence, to occupy
   one's self with trifles.

Shilly-shally \Shil"ly-shal`ly\, n.
   Irresolution; hesitation; also, occupation with trifles.

         She lost not one of her forty-five minutes in picking
         and choosing, -- no shilly-shally in Kate. --De
                                                  Quincey.