adjective, if·fi·er, if·fi·est. Informal.
- full of unresolved points or questions: an iffy situation.
- doubtful; questionable: An early decision on this is iffy.
adjective iffier or iffiest
- 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.