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The Collaborative International Dictionary of English v.0.48 (gcide)

Bob \Bob\ (b[o^]b), n. [An onomatopoetic word, expressing quick,
jerky motion; OE. bob bunch, bobben to strike, mock, deceive.
Cf. Prov. Eng. bob, n., a ball, an engine beam, bunch, blast,
trick, taunt, scoff; as, a v., to dance, to courtesy, to
disappoint, OF. bober to mock.]
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.
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In jewels dressed and at each ear a bob. --Dryden.
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2. A knot of worms, or of rags, on a string, used in angling,
as for eels; formerly, a worm suitable for bait.
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Or yellow bobs, turned up before the plow,
Are chiefest baits, with cork and lead enow.
--Lauson.
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3. A small piece of cork or light wood attached to a fishing
line to show when a fish is biting; a float.
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4. The ball or heavy part of a pendulum; also, the ball or
weight at the end of a plumb line.
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5. A small wheel, made of leather, with rounded edges, used
in polishing spoons, etc.
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6. A short, jerking motion; act of bobbing; as, a bob of the
head.
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7. (Steam Engine) A working beam.
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8. A knot or short curl of hair; also, a bob wig.
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A plain brown bob he wore. --Shenstone.
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9. A peculiar mode of ringing changes on bells.
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10. The refrain of a song.
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To bed, to bed, will be the bob of the song.
--L'Estrange.
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11. A blow; a shake or jog; a rap, as with the fist.
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12. A jeer or flout; a sharp jest or taunt; a trick.
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He that a fool doth very wisely hit,
Doth very foolishly, although he smart,
Not to seem senseless of the bob. --Shak.
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13. A shilling. [Slang, Eng.] --Dickens.
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Bob \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." --Thackeray.
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2. To angle with a bob. See {Bob}, n., 2 & 3.
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He ne'er had learned the art to bob
For anything but eels. --Saxe.
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{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 \Bob\, v. t. [imp. & p. p. {Bobbed}; p. pr. & vb. n.
{Bobbing}.] [OE. bobben. See {Bob}, n.]
1. To cause to move in a short, jerking manner; to move (a
thing) with a bob. "He bobbed his head." --W. Irving.
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2. To strike with a quick, light blow; to tap.
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If any man happened by long sitting to sleep . . .
he was suddenly bobbed on the face by the servants.
--Elyot.
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3. To cheat; to gain by fraud or cheating; to filch.
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Gold and jewels that I bobbed from him. --Shak.
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4. To mock or delude; to cheat.
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To play her pranks, and bob the fool,
The shrewish wife began. --Turbervile.
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5. To cut short; as, to bob the hair, or a horse's tail.
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