Twiddle one's thumbs

Twiddle one's thumbs
Kick one's heels / Sit on one's hands / Loaf around / Slack off

Girarsi i pollici 
Kick one's heels / Sit on one's hands / Loaf around / Slack off

Girarsi i pollici 
Meanings
To do little or nothing, usually while waiting; be idle
Examples
He just retired, but I know the man: he's not going to stay home kicking his heels. I'm sure he'll find something interesting to do
È andato in pensione, ma lo conosco: non è tipo da starsene a casa a girare i pollici e troverà senz'altro qualcosa di interessante da fare
My appointment at the doctor's was at 10 a.m., but he received me at noon, meaning that I sat in the waiting room for two hours twiddling my thumbs
Avevo appuntamento dal medico alle 10:00 ma mi ha ricevuto solo a mezzogiorno, per cui me ne sono stato due ore a girarmi i pollici in sala d'attesa