wag /ˈwæg/
  (vt.)搖擺,搖動,饒舌(vi.)擺動,喋喋不休搖擺,小丑
  Wag v. t. [imp. & p. p. Wagged p. pr. & vb. n. Wagging.]  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.
     No discerner durst wag his tongue in censure.   --Shak.
     Every one that passeth thereby shall be astonished, and wag his head.   --Jer. xviii. 16.
  Note: ☞ Wag expresses specifically the motion of the head and body used in buffoonery, mirth, derision, sport, and mockery.
  Wag, v. i.
  1. To move one way and the other; to be shaken to and fro; to vibrate.
     The resty sieve wagged ne'er the more.   --Dryden.
  2. To be in action or motion; to move; to get along; to progress; to stir.  [Colloq.]
     =\“Thus we may see,” quoth he, “how the world wags.”\=   --Shak.
  3. To go; to depart; to pack oft.  [R.]
     I will provoke him to 't, or let him wag.   --Shak.
  Wag, n.
  1. The act of wagging; a shake; as, a wag of the head.  [Colloq.]
  2.  A man full of sport and humor; a ludicrous fellow; a humorist; a wit; a joker.
     We wink at wags when they offend.   --Dryden.
     A counselor never pleaded without a piece of pack thread in his hand, which he used to twist about a finger all the while he was speaking; the wags used to call it the thread of his discourse.   --Addison.
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  wag
       n 1: a witty amusing person who makes jokes [syn: wit, card]
       2: causing to move repeatedly from side to side [syn: waggle,
           shake]
       v : move from side to side; "The happy dog wagged his tail"
           [syn: waggle]
       [also: wagging, wagged]