Longman Dictionary of Contemporary English - twiddle

~1 v 1 also twiddle with to move or turn something around with your fingers many times, especially because you are bored 2 twiddle your thumbs informal a) to do nothing while you are waiting for something to happen b) to join your fingers together and move your thumbs in a circle around each other, because you are bored - twiddle n ~2 n a small twist or turn, especially in a decorative pattern