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A debate has erupted between New York Times crossword puzzle editor Will Shortz, who says illin is a synonym of wack, as defined by the Dictionary of American Slang (see also: Run D.M.C.), and a concerned reader with a more modern interpretation of the term as a positive variation on chillin. Obviously, the most important thing here is that people’s parents learn to stop saying things like homeslice and fo’ shizzle.