Kia

Know-it-all. Someone who presumes to know more than what they actually do.

She should be driving a Kia. She is such a Kia. Know-it-all, intellectual, windbag

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heedoot

A heedoot is a person with less than average intelligence. A mentally challenged individual.

He was behaving like such a heedoot last night. Idiot , moron , grade schooler