Source : Webster's Revised Unabridged Dictionary (1913)

Frapping \Frap"ping\, n. [From {Frap}.] (Naut.)
   A lashing binding a thing tightly or binding things together.

Frap \Frap\, v. t. [imp. & p. p. {Frapped}; p. pr. & vb. n.
   {Frapping}.] [Cf. F. frapper to strike, to seize ropes. Cf.
   {Affrap}.]
   1. (Naut.) To draw together; to bind with a view to secure
      and strengthen, as a vessel by passing cables around it;
      to tighten; as a tackle by drawing the lines together.
      --Tottem.

   2. To brace by drawing together, as the cords of a drum.
      --Knoght.

Source : WordNet®

frapping
     See {frap}

frap
     v 1: make secure by lashing; "frap a sail"
     2: take up the slack of; "frap a rope"
     [also: {frapping}, {frapped}]