A fictional source of plagiarized content, humorously likened to something that has been photocopied (as with the Xerox brand of photocopiers). A: "Did you hear that parts of the senator's speech were taken nearly word-for-word from his opponent's from three years ago?" B: "Sounds like he's got team Xerox writing his stuff." Nowadays, you're guaranteed to have at least one student who gets their papers from team Xerox.