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kerflooey

[ker-floo-ee]
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adverb, go kerflooey,
  1. Informal. to cease functioning, especially suddenly and completely; fall apart; fail: As soon as the storm hit, every light in town went kerflooey.
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Origin of kerflooey

see origin at ker-, flooey
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018