noun
moron
MOR-ahn/ˈmɔːrɑːn/
An insulting term for a very foolish or stupid person.
She looks like a moron watering the umbrella instead of the plant.

Etymology
Greek mōros meant “foolish” or “dull,” though its deeper origin is uncertain. The English word began as a medical classification before becoming an insult and falling out of technical use.
In context
Are you a moron?"
More examples
- Don't call me a moron just because I disagree.
- Only a moron would leave a burning candle beside the curtains.
- We look like morons standing outside the wrong building.
Forms
moron · morons
moronic adjective — Extremely foolish or stupid; used insultingly.