Definitions of whiff:

• noun:   a strikeout resulting from the batter swinging at and missing the ball for the third strike
• noun:   a lefteye flounder found in coastal waters from New England to Brazil
• noun:   a short light gust of air
• verb:   drive or carry as if by a puff of air

  Example: "The gust of air whiffed away the clouds"

• verb:   utter with a puff of air

  Example: "Whiff out a prayer"

• verb:   strike out by swinging and missing the pitch charged as the third
• verb:   perceive by inhaling through the nose
• verb:   smoke and exhale strongly

  Example: "Whiff a pipe"