The Collaborative International Dictionary of English v.0.48:

Whiffet \Whif"fet\, n.
   A little whiff or puff.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "whiffet":
   a nobody, a nothing, breath, breath of air, capful of wind, cipher,
   common man, dummy, figurehead, flatus, insignificancy, jackstraw,
   lightweight, little fellow, little guy, man of straw, mediocrity,
   nebbish, nobody, nobody one knows, nonentity, nothing, nullity,
   obscurity, pip-squeak, puff, puff of air, puff of wind, punk, runt,
   scrub, shrimp, small fry, small potato, small potatoes, squirt,
   squit, stir of air, waft, whiff, whippersnapper, zero, zilch