doozy

• doozie
• dozy
• duesy

Perhaps from daisy (the flower) or the name of Italian actress Eleonora Duse. The automobile manufacturer Duesenberg is often erroneously cited as the etymology of doozy; while seemingly sensical, the original usage of the latter predates the former by more than a decade. Doozy's origin is still unknown.

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doozy (plural doozies)

1. (US, informal) Something that is extraordinary: often troublesome, difficult or problematic, but sometimes extraordinary in a positive sense.

   Synonym: lulu

   • 2017, Eric A Meyer; Estelle Weyl, CSS: The Definitive Guide: Visual Presentation for the Web, Kindle edition, O'Reilly Media, page 126:

     Like the em unit, the rem unit is based on declared font size. The difference — and it’s a doozy — is that whereas em is calculated using the font size of the element to which it’s applied, rem is always calculated using the root element.

   Most of the test was easy, but the last question was a doozy.

doozy (not generally comparable, comparative doozier, superlative dooziest)

1. (slang, dated) Of high quality; remarkable; excellent. [1903]
   • 1903, Alfred Leon Kleberg, Slang Fables from Afar, page 83:

     As soon as the races were billed he began to evolve Schemes — one Doozy scheme followed the other...

   • 2011, “Feeling Pinkie Keen”, in My Little Pony: Friendship is Magic:

     The hydra wasn't the doozy? How could it not be the doozy? What could be doozier than that?

2. (slang, US, archaic) Sporty, ostentatious, flashy. [1911]
   • 1917, Elsie Warnock, “Terms of approbation and eulogy in American dialect speech”, in Dialect Notes, volume IV, page 21:

     Who was that doozy fellow I saw you with?

   • 1920, Jane Barrett, “English review”, in High School Life, volume 21, page 531:

     Sweetie, do let me show you the dooziest little afternoon frock that Poiret designed for me in Paris.

• “Doozy” in Michael Quinion, Ballyhoo, Buckaroo, and Spuds: Ingenious Tales of Words and Their Origins, Washington, D.C.: Smithsonian Books in association with Penguin Books, 2004, →ISBN.
• "Doozy" in J.E. Lighter, Random House Historical Dictionary of American Slang volume 1, 1994.