twiddle one's thumbs
Definition from Wiktionary, the free dictionary
- to circle one's thumbs around one another, usually with the fingers interlaced, usually done idly while waiting or bored
- (idiomatic) To wait or dawdle; to accomplish nothing useful or lack a useful occupation.
- He twiddled his thumbs for almost a week while he waited for somebody to set up his computer.
to circle one's thumbs around one another