not to make a clear choice between two possibilities.
być niezdecydowanym, wyczekiwać, wahać się
I think I'll sit on the fence on this one, don't want to get mud slung in my face.
She criticized members of the committee for sitting on the fence and failing to make a useful contribution to the debate.
You can not sit on the fence an entire year, but that's exactly what the EU has been doing.
This time we'll sit on the fence and let you decide.
I will sit on the fence, not because of the decision, but I am just not convinced.
Wymowa: