The Collaborative International Dictionary of English v.0.48:

Gib \Gib\, v. t. [imp. & p. p. Gibbed; p. pr. & vb. n.
   Gibbing.]
   To secure or fasten with a gib, or gibs; to provide with a
   gib, or gibs.
   [1913 Webster]

   Gibbed lathe, an engine lathe in which the tool carriage is
      held down to the bed by a gib instead of by a weight.
      [1913 Webster]