Wāg1, v. t.
v. t. [imp. & p. p. WAGGED; p. pr. & vb. n. WAGGING.] [A-S. wegan, weegan, wagian, to carry, move, wag, O. Sax. wegian, Goth. wigan, ga-vigan, O. H. Ger. wegan, wegian, M. H. Ger. wegen, N. H. Ger. & D. bewegen, Dan. bevæge, Sw. beveka, vagga.] To move one way and the other with quick turns; to shake to and fro; to move vibratingly; to cause to vibrate, as a part of the body; as, to wag the head.
Every one that passeth thereby shall be astonished, and wag his head. Jer. xviii. 16.
Wag expresses particularly the motion of the head and body used in buffoonery, mirth, derision, sport, and mockery. It is applied also to birds and beasts; as, to wag the tail.