The Collaborative International Dictionary of English v.0.48:

Huff \Huff\, v. t. [imp. & p. p. Huffed; p. pr. & vb. n.
   Huffing.] [Cf. OE. hoove to puff up, blow; prob. of
   imitative origin.]
   1. To swell; to enlarge; to puff up; as, huffed up with air.
      --Grew.
      [1913 Webster]

   2. To treat with insolence and arrogance; to chide or rebuke
      with insolence; to hector; to bully.
      [1913 Webster]

            You must not presume to huff us.      --Echard.
      [1913 Webster]

   3. (Draughts) To remove from the board (the piece which could
      have captured an opposing piece). See Huff, v. i., 3.
      [1913 Webster]

WordNet (r) 3.0 (2006):

huffing
    n 1: an act of forcible exhalation [syn: puffing, huffing,
         snorting]