adjective, if·fi·er, if·fi·est. Informal.

  1. full of unresolved points or questions: an iffy situation.
  2. doubtful; questionable: An early decision on this is iffy.

adjective iffier or iffiest

  1. informal uncertain or subject to contingencythis scheme sounds a bit iffy

1937, American English, from if + -y (2). Originally associated with President Franklin D. Roosevelt.

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