Definition & Meaning of "beetlehead"in English

What is the origin of the term "beetlehead" and how is it used?

"Beetlehead" is an English slang insult that likely appeared in the 20th century, combining "beetle" (a small, hard-headed insect) with "head" to suggest someone is stupid, dull-witted, or slow-thinking. The term is used in informal speech, schoolyard teasing, and humorous criticism to mock a person's intelligence or judgment. It is derogatory but mild, generally playful or humorous rather than deeply offensive.