: to move something from side to side repeatedly [+ obj] ▪ The dog wagged its tail. ▪ She wagged her finger at the children as she scolded them. ▪ He wagged his head back and forth. [no obj] ▪ The dog's tail began to wag excitedly.
the tail wagging the dog — see 1tail
tongues (are) wagging — see 1tongue