When something juts, it extends outward. Your nose juts out from your face, just as your ears jut from your head. If you’re feeling determined, you might jut out your chin.
The word jut applies to anything sticking out. Anything that goes beyond the main line of something juts out, like a rock on a coastline or a bump on a log. If you walk into a room with your chin jutting out, people better watch out because you mean business.