Meaning & Definition
noun
A person who is regarded as lacking in intelligent thought or common sense.
He called him a moron for forgetting the plan we discussed.
An offensive term for someone perceived to be foolish or stupid.
It was a moronic mistake to ignore the warning signs.
Historically used in psychology to classify someone with a mild intellectual disability.
The outdated classification of 'moron' is no longer used in modern psychology.
Etymology
From the Greek 'moros' meaning 'foolish.'
Common Phrases and Expressions
act like a moron:
To behave foolishly or stupidly.
what a moron!:
An exclamation used to describe someone perceived as very stupid.
don't be a moron:
A warning not to act foolishly.
Slang Meanings
Nitwit
Stop being a nitwit and listen to the instructions!
Dumbass
Only a dumbass would take that risk.