up in the air

(adjective) uncertain, unsure, full of doubt

Example Sentences:

A: What are you going to do after graduating high school?
B: I’m not sure. The future is kind of up in the air.

I was going to go to Europe to start a new job, but now everything is up in the air because I didn’t get the job.

Media:

Similar idioms:

1. iffy
2. hot air
3. walking on air
4. give someone the benefit of the doubt
5. as you sow, so you shall reap