wagtail(redirected from the wag tail)
obsolete A promiscuous woman, often a prostitute. Those poor wagtails will have nowhere to turn when they're released, so they'll most likely will end up back on the streets again. Someone needs to tell young Reginald that a woman with a reputation as a wagtail has no place in this celebrated family.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.