Tard

Someone who is beyond stupid. A person could become stupid through no fault of their own. A Tard, however, is never so innocent.

Tard:

- One who revels in their own willful ignorance.

Or, who chooses to remain uniformed about a topic, despite being very emotionally invested in it.

- Someone with a profound lack of sense.

"Dude, did he seriously just mansplain evolution to an evolutionary biologist?"
"Yeah. He's such a Tard."