English

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Etymology

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yay +‎ -ness

Pronunciation

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Interjection

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yayness

  1. (slang, childish) yay; hooray
    • 2000, Miss Sparkle, “Much yayness of the yay variety!”, in alt.uk.penpals (Usenet):
      Wooo, yayness for you also! :)
    • 2001, Belegdel, “ten for ten [poll]”, in aus.culture.gothic (Usenet):
      I finally have Aliens Special Edition! Yayness!