To cause to move up and down, backward and forward, or from side to side, alternately, as a small body jointed or attached to, or connected with, a larger one; cause to move one way or another, as on a pivot or joint, or on or from something by which the body moved is supported; cause to shake, oscillate, or vibrate slightly.To nudge.To move backward and forward, up and down, or from side to side, alternately, as if connected with a larger body by a joint. pivot, or any flexible or loose attachment; oscillate; sway or swing; vibrate: an arrow is said to wag when it vibrates in the air.To be in motion or action; make progress; continue a course or career; stir.To move on or away; be off; depart; pack off; be gone.n. The act of wagging; a shake; an oscillation.n. One who is given to joking or jesting; a witty or humorous person; one full of sport and humor; a droll fellow.n. A fellow: used with a shade of meaning sometimes slurring, sometimes affectionate, but without any attribution of humor or pleasantry.