The Collaborative International Dictionary of English v.0.48:

Puff \Puff\, n. [Akin to G. & Sw. puff a blow, Dan. puf, D. pof;
   of imitative origin. Cf. Buffet.]
   1. A sudden and single emission of breath from the mouth;
      hence, any sudden or short blast of wind; a slight gust; a
      whiff. " To every puff of wind a slave." --Flatman.
      [1913 Webster]

   2. Anything light and filled with air. Specifically:
      (a) A puffball.
      (b) kind of light pastry.
      (c) A utensil of the toilet for dusting the skin or hair
          with powder.
          [1913 Webster]

   3. An exaggerated or empty expression of praise, especially
      one in a public journal.
      [1913 Webster]

   Puff adder. (Zool.)
      (a) Any South African viper belonging to Clotho and
          allied genera. They are exceedingly venomous, and have
          the power of greatly distending their bodies when
          irritated. The common puff adder (Vipera arietans,
          or Clotho arietans) is the largest species, becoming
          over four feet long. The plumed puff adder (Clotho
          cornuta) has a plumelike appendage over each eye.
      (b) A North American harmless snake (Heterodon
          platyrrhinos) which has the power of puffing up its
          body. Called also hog-nose snake, flathead,
          spreading adder, and blowing adder.

   Puff bird (Zool.), any bird of the genus Bucco, or family
      Bucconid[ae]. They are small birds, usually with
      dull-colored and loose plumage, and have twelve tail
      feathers. See Barbet
      (b) .
          [1913 Webster]

WordNet (r) 3.0 (2006):

hognose snake
    n 1: harmless North American snake with upturned nose; may
         spread its head and neck or play dead when disturbed [syn:
         hognose snake, puff adder, sand viper]