etymology: taken from the name of a character from Puccini's Madame Butterfly, Pinkerton, a United States Naval Officer who pursues a fifteen year-old Japanese girl while stationed there, despite having no intention of staying with her, eventually returning stateside to his American wife after impregenating Cio-Cio-san, or Madame Butterfly. He later returns to Japan with his American wife to take the bastard hapa child of Butterfly/Suzuki and Pinkerton home with the two of them to take care of, which ultimately drives Suzuki to suicide.
See also: White Devil
adj. "Rivers Cuomo is feeling mighty pinkerton these days."