The Collaborative International Dictionary of English v.0.48:

Dibble \Dib"ble\, v. i. [imp. & p. p. Dibbled; p. pr. & vb. n.
   Dibbling.] [Freq. of Prov. E. dib, for dip to thrust in.
   See Dip.]
   To dib or dip frequently, as in angling. --Walton.
   [1913 Webster]