“Man! I asked Carl to show me how to fill in this form, and when I didn’t get it right away he just blew up!” “Yeah, he has a really short fuse.”

If a bomb or a stick of dynamite has a long fuse, it will take a long time for the fuse to burn before the bomb explodes. But if it has a short fuse, it will explode quickly. When a person gets mad very easily, we say he or she has a short fuse.