From Longman Dictionary of Contemporary Englishworry beadsˈworry beads noun [plural] DGODCJa set of beads on a string that you move about in order to keep yourself calm
Examples from the Corpus
worry beads• Use a couple of small ones as worry beads, jiggling them around in the palm of your hand.• He passes time gossiping, fingering worry beads and sipping ouzo.• Shoulders hunched into the collar of his leather jacket, fists clenched inside the pockets, eyes little worry beads of suspicion. 