Source : Webster's Revised Unabridged Dictionary (1913)

Vapor \Va"por\, v. i. [imp. & p. p. {Vapored}; p. pr. & vb. n.
   {Vaporing}.] [From {Vapor}, n.: cf. L. vaporare.] [Written
   also {vapour}.]
   1. To pass off in fumes, or as a moist, floating substance,
      whether visible or invisible, to steam; to be exhaled; to
      evaporate.

   2. To emit vapor or fumes. [R.]

            Running waters vapor not so much as standing waters.
                                                  --Bacon.

   3. To talk idly; to boast or vaunt; to brag.

            Poets used to vapor much after this manner.
                                                  --Milton.

            We vapor and say, By this time Matthews has beaten
            them.                                 --Walpole.

Vaporing \Va"por*ing\, a.
   Talking idly; boasting; vaunting. -- {Va"por*ing*ly}, adv.

Source : WordNet®

vaporing
     n : an instance of boastful talk; "his brag is worse than his
         fight"; "whenever he won we were exposed to his
         gasconade" [syn: {brag}, {bragging}, {crow}, {crowing}, {line-shooting},
          {gasconade}]