This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Informal Doubtful; uncertain: an iffy proposition.

adj. Of dubious authenticity, legitimacy or legality.

adj. Uncertain or chancy.

adj. subject to accident or chance or change

"I dunno, I see "Syfy" and I see "siffy" at best ... and "iffy" is how I'm classifying this plan, in the end."

uncertain   

doggy    fishy    dubious   

Giffy    Spiffy    jiffy    sniffy    spiffy   

nine-volt    either/or    anti-buddhist    rsenal    nickel-cadmium    dry-cell    6-volt    long-life    well-based    either-or