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The Best Internet Slang

gray hat

[grey hat] /ˈgreɪ ˈhæt/
noun, Digital Technology, Informal.
1.
a hacker who violates the security of a system without true malicious intent but often without the prior knowledge or consent of the owner or developer, and who later reports system vulnerabilities to the authorities, sometimes for personal profit.
See also black hat, white hat.
Origin of gray hat
1995-2000
First recorded in 1995-2000
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for gray hat
Historical Examples
  • His gray hat was pushed aslant as his head rested against hers.

    Rowdy of the Cross L B.M. Sinclair, AKA B.M. Bower
  • Cal Emmett strode up and grabbed the limp, gray hat from his head and began using it for a football.

    Chip, of the Flying U B. M. Bower
  • He lay, a long length of brown chaps, pink-and-white shirt and gray hat, just where he had fallen.

    Chip, of the Flying U B. M. Bower
  • The driver was a man of substance—solid, of a gravity tempered with humor, a giant in a brown box-coat, with gray hat and mittens.

  • Hard wear and weather had softened his gray hat into a disreputable slouch affair.

    The Missourian

    Eugene P. (Eugene Percy) Lyle
  • He wore a gray hat, half-high in the crown, and a gray coat which flapped his calves when he walked.

    Old Caravan Days Mary Hartwell Catherwood
  • But don't forget, my boys, to bring that coat and gray hat back to Madame Louchard.

    Monsieur Cherami Charles Paul de Kock
  • She repeated what she had already said to Helen about the stranger's gray hat and brown coat.

  • From the wide brim of his soft, gray hat to the spurs on his riding-boots, he was faultlessly dressed.

    The Little Colonel in Arizona Annie Fellows Johnston
  • “Cass wore a gray hat too, seems to me,” Mackenzie contributed, scratching his gray hair.

    Crooked Trails and Straight William MacLeod Raine

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