sit on the fence

Meaning

1. to avoid becoming involved in deciding or influencing sth

   He tends to sit on the fence at meetings.

From the same entry

• be sitting pretty
• sit at feet
• sit comfortably, easily, well
• sit in judgement
• sit tight
• sit bolt upright
• rest on your laurels
• sit silently by
• sit about
• sit back
• sit by
• sit down