do someone dirty

• do someone dirt

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do someone dirty

1. (idiomatic) To deliberately treat someone in an unfair or harmful manner.
   • 1966, George Hanna, "Death of 'Devil Anse' Hatfield Was 45 Years Ago," Tri-City Herald (Washington State, USA), 5 Jan., p. 36 (retrieved 28 July 2010):

     Johnse lived with her, but didn't marry her. Later he married her cousin. "He did her dirty," says Willis Hatfield of his brother's affair with Roseann.

   • 1971, Al Levine, "Dolphins sign Mira and (surprise) Del Gaizo," Miami News, 10 April, p. 1B (retrieved 28 July 2010):

     Mira, who thought the Colts did him dirty by not activating him as they promised, did not call back.

   • 2005, Rashaun Hall, "Mario Shoots Heartbreaking New Video," mtv.com, 2 Feb. (retrieved 28 July 2010):

     She was cheating on him—doing him dirty.

• do the dirty on

• dirty business