| backscatter | (verb) scatter (radiation) by the atoms of the medium through which it passes | - |
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| backslap | (verb) display excessive cordiality (towards) | - |
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| backslide | (verb) drop to a lower level, as in one's morals or standards | Synonyms: lapse |
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| backspace | (verb) hit the backspace key on a computer or typewriter keyboard | - |
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| backstitch | (verb) do backstitches | - |
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| backstop | (verb) act as a backstop | - |
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| backstroke | (verb) swim on one's back | - |
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| bollocks | (verb) make a mess of, destroy or ruin | Synonyms: ball up, blow, bobble, bodge, bollix, bollix up, bollocks up, botch, botch up, bumble, bungle, flub, fluff, foul up, fuck up, fumble, louse up, mess up, mishandle, muck up, muff, screw up, spoil |
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| corkscrew | (verb) move in a spiral or zigzag course | Synonyms: spiral |
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| huckster | (verb) sell or offer for sale from place to place | Synonyms: hawk, monger, peddle, pitch, vend |
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| (verb) wrangle (over a price, terms of an agreement, etc.) | Synonyms: chaffer, haggle, higgle |
| quickstep | (verb) perform a quickstep | - |
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| silkscreen | (verb) print by silkscreen | - |
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