Luff

v. i.
  1. (Naut.) To turn the head of a vessel toward the wind; to sail nearer the wind; to turn the tiller so as to make the vessel sail nearer the wind.
  2. (Naut.) To flutter or shake from being aligned close to the direction of the wind; -- said of a sail.
    3. To luff round, or To luff alee ,
    to make the extreme of this movement, for the purpose of throwing the ship's head into the wind.