English

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Etymology

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twin +‎ -y

Adjective

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twinny (comparative more twinny, superlative most twinny)

  1. (informal) Resembling or characteristic of twins.
    Synonym: twinnish
    • 2009, Abigail Pogrebin, One and the Same, page 220:
      The Lord parents didn't do cutesy, twinny things with the boys, but Tim admits, “They did some stuff that was a little icky.”
      Like what?
      “We had to perform a song together at one of their cocktail parties.”