spook by the door
n.— «He claims Benjamin and Williams label white people who speak out against them as racists and any other black person who opposes them as a “spook by the door,” a pejorative term referring to a black person who spies on the black community for white people.» —“A Tangled Web” by Nathan Stubbs Independent (Lafayette, La.) Jan. 18, 2006. (source: Double-Tongued Dictionary)
Further reading
The word filibuster has a long and colorful history, going back to the days when pirates roamed the high seas. Today it refers to hijacking a piece of legislation. Plus, the language of yoga teachers: When doing a guided meditation, you may hear...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...