bob /ˈbɑb/
  (vt.)剪短,敲擊,急拉(vi.)振動,上下跳動髮髻,微不足道的東西,懸掛的飾品
  Bob n.
  1. Anything that hangs so as to play loosely, or with a short abrupt motion, as at the end of a string; a pendant; as, the bob at the end of a kite's tail.
     In jewels dressed and at each ear a bob.   --Dryden.
  2. A knot of worms, or of rags, on a string, used in angling, as for eels; formerly, a worm suitable for bait.
  Or yellow bobs, turned up before the plow,
  Are chiefest baits, with cork and lead enow.   --Lauson.
  3. A small piece of cork or light wood attached to a fishing line to show when a fish is biting; a float.
  4. The ball or heavy part of a pendulum; also, the ball or weight at the end of a plumb line.
  5. A small wheel, made of leather, with rounded edges, used in polishing spoons, etc.
  6. A short, jerking motion; act of bobbing; as, a bob of the head.
  7. Steam Engine A working beam.
  8. A knot or short curl of hair; also, a bob wig.
     A plain brown bob he wore.   --Shenstone.
  9. A peculiar mode of ringing changes on bells.
  10. The refrain of a song.
     To bed, to bed, will be the bob of the song.   --L'Estrange.
  11. A blow; a shake or jog; a rap, as with the fist.
  12. A jeer or flout; a sharp jest or taunt; a trick.
  He that a fool doth very wisely hit,
  Doth very foolishly, although he smart,
  Not to seem senseless of the bob.   --Shak.
  13. A shilling. [Slang, Eng.]
  Bob v. t. [imp. & p. p. Bobbed p. pr. & vb. n. Bobbing.]
  1. To cause to move in a short, jerking manner; to move (a thing) with a bob. “He bobbed his head.”
  2. To strike with a quick, light blow; to tap.
     If any man happened by long sitting to sleep . . . he was suddenly bobbed on the face by the servants.   --Elyot.
  3. To cheat; to gain by fraud or cheating; to filch.
     Gold and jewels that I bobbed from him.   --Shak.
  4. To mock or delude; to cheat.
  To play her pranks, and bob the fool,
  The shrewish wife began.   --Turbervile.
  5. To cut short; as, to bob the hair, or a horse's tail.
  Bob, v. i.
  1. To have a short, jerking motion; to play to and fro, or up and down; to play loosely against anything. “Bobbing and courtesying.”
  2. To angle with a bob. See Bob, n., 2 & 3.
  He ne'er had learned the art to bob
  For anything but eels.   --Saxe.
  To bob at an apple, cherry, etc. to attempt to bite or seize with the mouth an apple, cherry, or other round fruit, while it is swinging from a string or floating in a tug of water.
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  bob
       n 1: a former monetary unit in Great Britain [syn: British
            shilling, shilling]
       2: a hair style for women and children; a short haircut all
          around
       3: a long racing sled (for 2 or more people) with a steering
          mechanism [syn: bobsled, bobsleigh]
       4: a hanging weight, especially a metal ball on a string
       5: a small float usually made of cork; attached to a fishing
          line [syn: bobber, cork, bobfloat]
       6: a short or shortened tail of certain animals [syn: bobtail,
           dock]
       7: a short abrupt inclination (as of the head); "he gave me a
          short bob of acknowledgement"
       v 1: move up and down repeatedly; "her rucksack bobbed gently on
            her back"
       2: ride a bobsled; "The boys bobbed down the hill screaming
          with pleasure" [syn: bobsled]
       3: remove or shorten the tail of an animal [syn: dock, tail]
       4: make a curtsy; usually done only by girls and women; as a
          sign of respect; "She curtsied when she shook the Queen's
          hand" [syn: curtsy]
       5: cut hair in the style of a bob; "Bernice bobs her hair these
          days!"
       [also: bobbing, bobbed]