The Collaborative International Dictionary of English v.0.48:

Niggle \Nig"gle\, v. t. [imp. & p. p. Niggled; p. pr. & vb. n.
   Niggling.] [Dim. of Prov. E. nig to clip money; cf. also
   Prov. E. nig a small piece.]
   To trifle with; to deceive; to mock. [Obs.] --Beau. & Fl.
   [1913 Webster]