01It's up in the air
Still uncertain or undecided; no conclusion has been reached yet.
A: So are you moving to London or not?
B: Honestly, it's still up in the air — we're waiting to hear back about the job.
02Get the ball rolling
To start a process or activity, especially one that others will then continue or build on.
We've been planning this for months — someone just needs to get the ball rolling and book the venue.
03Fair enough
Used to acknowledge that something is reasonable or acceptable, even if it's not ideal.
A: I can't make it Saturday — I've already got plans.
B: Fair enough. We'll figure out another time.