Moronic (adjective)

Extremely stupid or foolish.

Origin:

From the word "moron" which was coined in 1910 by psychologist henry h. goddard from the greek "mōros" meaning "foolish" or "dull".

Examples:

1. His moronic behavior was embarrassing to everyone in the room.
2. She couldn't believe he made such a moronic mistake.
3. The moronic decision led to the company's downfall.
4. His moronic comment made everyone cringe.
5. The moronic reality show was a waste of time.