Village troll

The village troll in strict terms is a person locally known for ignorance or stupidity, but is also a common term for a stereotypically silly or nonsensical person or stock character. The term is also used as a stereotype of the mentally disabled. These types often make themselves feel important by instigating public figures to boost their ego. While they can be described as mentally challenged they are keen on attracting on other villagers to a circle jerk of idiocy.

No one takes the village troll seriously, he's just here for comic relief.