Chowderhead

Chowderhead is an internet slang term used to refer to someone who is foolish, stupid, or lacks common sense. It is a derogatory term often used to insult someone’s intelligence.

Examples:

1. John couldn’t figure out how to attach a file to an email. What a chowderhead!
2. Donna kept asking the same question over and over again, even though the answer was already given. She can be such a chowderhead sometimes!