The Collaborative International Dictionary of English v.0.48:

Fidget \Fidg"et\, v. i. [imp. & p. p. Fidgeted; p. pr. & vb.
   n. Fodgeting.] [From Fidge; cf. OE. fiken to fidget, to
   flatter, Icel. fika to hasten, Sw. fika to hunt after, AS.
   befician to deceive. Cf. Fickle.]
   To move uneasily one way and the other; to move irregularly,
   or by fits and starts. --Moore.
   [1913 Webster]