Sit on the fence
Definition 1 of 1
Pro Tip 1/3Decision Avoidance
Used when someone avoids committing to a choice or revealing their opinion. 
Everyone shared their thoughts, but Mike sat on the fence.
Pro Tip 2/3Neutral Stance
Implies the act of remaining neutral when others expect a clear position. 
When asked about team preferences, Jenna just sat on the fence.
Pro Tip 3/3Indecision
Highlights a struggle in making a decision, not just the avoidance. 
Although the choice was tough, he shouldn't sit on the fence for too long.