Longman Dictionary of Contemporary English
Wiktionary
n. (context British English) A person widely known in their community for their stupidity and ignorant behaviour.
Wikipedia
The village idiot 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. The term is also used as a stereotype of the mentally disabled. It has also been applied as an epithet for an unrealistically optimistic or naive individual. In urban vocabulary, the word includes anyone with low tolerance or high resistance to change (in technology, culture, etc.)
The village idiot was long considered an acceptable social role, a unique individual who was dependent yet contributed to the social fabric of his community. As early as Byzantine times, the "village idiot" was treated as an acceptable form of disabled individual compatible with then-prevailing normative conceptions of social order. The concept of a "village savant" or "village genius" is closely related, often tied to the concept of pre-industrial anti-intellectualism, as both figures are subjects of both pity and derision. The social roles of the two are combined and applied, especially in the sociopolitical context, in the European medieval/Renaissance court jester.
Village Idiot is a 2012 album by Andreas Johnson.
Usage examples of "village idiot".
People all the time are laughing at me and making cracks about me and trying to bait me because I'm the village idiot, but there are times when the village idiot has it over all of them.
I suppose you has all heard of the village idiot, who was usually some retarded individual livin in a village someplace.
Giordino grinned like the village idiot as he poured a handful of sand into his hair.
Sharpe remembered Ronnie, a village idiot in Yorkshire, whose parents would shackle him to the stump of an elm on the village green where Ronnie would bellow at the grazing cows, talk to himself and growl at the girls.
The Prince made a great play of peering into the valley, shading his eyes and gaping like a village idiot.