Shoo is the homonym of shoe. Shoo was first recorded in late Middle English as a natural exclamation, like "ugh" or "ick". When you tell someone to shoo, you want them to go away.

Shoo can be a very useful word when you find yourself surrounded by small, barking dogs.

Perhaps you've heard of shoo-fly pie, which is a very sweet pie made with molasses. It attracted so many flies that it came to be called shoo-fly, because pie-makers were always saying, "Shoo, fly!" when they were around it. So, um, don't order it with raisins.