to dance on nothing

from The Collaborative International Dictionary of English v.0.48
Dance \Dance\ (d[.a]ns), v. i. [imp. & p. p. {Danced}; p. pr. &
   vb. n. {Dancing}.] [F. danser, fr. OHG. dans[=o]n to draw;
   akin to dinsan to draw, Goth. apinsan, and prob. from the
   same root (meaning to stretch) as E. thin. See {Thin}.]
   1. To move with measured steps, or to a musical
      accompaniment; to go through, either alone or in company
      with others, with a regulated succession of movements,
      (commonly) to the sound of music; to trip or leap
      rhythmically.
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            Jack shall pipe and Gill shall dance. --Wither.
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            Good shepherd, what fair swain is this
            Which dances with your daughter?      --Shak.
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   2. To move nimbly or merrily; to express pleasure by motion;
      to caper; to frisk; to skip about.
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            Then, 'tis time to dance off.         --Thackeray.
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            More dances my rapt heart
            Than when I first my wedded mistress saw. --Shak.
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            Shadows in the glassy waters dance.   --Byron.
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            Where rivulets dance their wayward round.
                                                  --Wordsworth.
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   {To dance on a rope}, or {To dance on nothing}, to be hanged.
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