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whizzo

[hwiz-oh, wiz-oh]British Slang.
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adjective
  1. absolutely first-rate; superb; excellent.
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interjection
  1. (used as an exclamation of approval, wonder, or pleasure.)
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Origin of whizzo

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018