What it means
Iffy means uncertain, questionable, a bit dodgy. Use it for anything that doesn’t feel reliable, safe, or likely to work out, from a story that doesn’t add up to milk that’s turned. Softer than calling something rubbish, but everyone gets the message. Often said with a face like you’ve just sniffed something suspicious.
Usage examples
"You sure this milk’s fine? Give it a sniff. Nah, it’s proper iffy. Bin it before you end up hugging the loo."
"The forecast is a bit iffy for Saturday, so bring a coat just in case the barbecue turns into a paddling pool."
"His excuse sounded iffy from the start, too many details that did not quite line up."
Where it comes from
Comes straight from the little word if, as in a thing so loaded with ifs and maybes that you cannot trust it to hold up. Pile enough conditions onto a plan and it goes from solid to iffy, riddled with doubt and likely to wobble at the worst moment.
Other ways to say it
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