[wag] vb wagged ; wag.ging [ME waggen; akin to MHG wacken to totter, OE wegan to move--more at way] vi (13c) 1: to be in motion: stir
2: to move to and fro or up and down esp. with quick jerky motions
3: to move in chatter or gossip "scandal caused tongues to ~"
4. archaic: depart
5: waddle ~ vt 1: to swing to and fro or up and down esp. with quick jerky motions: switch; specif: to nod (the head) or shake (a finger) at (as in assent or mild reproof)
2: to move (as the tongue) animatedly in conversation -- wag.ger n
[2]wag n (1589): an act of wagging: shake [3]wag n [prob. short for obs. E waghalter gallows bird, fr. E [1]wag + halter] (ca. 1553) 1: wit, joker
2. obs: a young man: chap