nibbing

from The Collaborative International Dictionary of English v.0.48

Nib \Nib\, v. t. [imp. & p. p. {Nebbed}; p. pr. & vb. n.
   {Nibbing}.]
   To furnish with a nib; to point; to mend the point of; as, to
   nib a pen.
   [1913 Webster]