Definition: Whiffy is a slang term that refers to someone who seems to be wearing an overly-fluffy or garish outfit. It often implies that they are trying to make a statement, but may not be fully aware of their surroundings. Whiffs can also refer to a person's mood or attitude, which can sometimes be described as "whiffy" when the speaker is expressing surprise or delight in something. In general, whiffy is used to indicate someone who seems to be wearing something