This expression purportedly comes from the practice of corrupt jockeys holding their horses back and shooing a preselected winner across the finish line to guarantee that it will win. A “shoo-in” is now an easy winner, with no connotation of dishonesty. “Shoe-in” is a common misspelling.
This is the ten-year anniversary of the Common Errors in English Usage calendar. To celebrate, we are bringing back some of our favorite interesting, funny, but sometimes merely silly entries through the years before going on hiatus in 2016.
Enjoy the calendar? Buy the book! (http://tinyurl.com/commonerrorsbook)