Idiom
on the fence (about something)
Theme: DECISION
undecided. (Informal.)Ann is on the fence about going to Mexico.I wouldn't be on the fence. I'd love to go.
Idiom
on the fence
not able to decide something.Many consumers are still on the fence, waiting to see if a better, less expensive computer will come along.
Usage notes: often used with sit:
Most people sit on the fence and would rather say "maybe" than "yes" or "no."