Dumassaphobia is a phobia where you are afraid of dumb people. If you have dumasaphobia, you will be afraid or have a fear of senseless people. They can be customers, your boss, a friend, a stranger, a student, your own teacher, or pretty much anyone you know. It seems rude, but it's just a phobia. For example, you might have dumasaphobia. If you do, you'd be afraid of dumb people, no matter who they are. For example, if someone has mental retardation, a person with this phobia (Dumasaphobia), they will just ignore them or just avoid them as much as possible. For example, if Justin has dumasaphobia and he thinks that his colleague, Richard, is dumb, he will avoid him as much as possible.