slacklining - definition and synonyms

noun [uncountable] 

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/ˈslækˌlaɪnɪŋ/
  1. the sport of walking or balancing on a piece of flat nylon rope stretched above the ground

    If you’ve ever wanted to walk a tightrope high above the circus floor but got nervous just thinking about it, slacklining may be for you.

derived word

slackliner

 

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noun [countable]
singularslackliner
pluralslackliners