From bash +‎ -y.

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• Audio (Southern England):

  (file)

• Rhymes: -æʃi

bashy (comparative bashier, superlative bashiest)

1. (music) Intensely percussive
   • 1995 August 4, Bill Wyman, “Son Volt”, in Chicago Reader‎^[1]:

     The record doesn't refuse to rock: the trebly attack of songs like "Drown" and "Route" is reminiscent of the bashy splendor of the earliest Tupelo releases.

• Ashby