dimwit
nounUK /ˈdɪm.wɪt/
US /ˈdɪm.wɪt/
A dimwit is a person who is not very smart.
He forgot his own phone number and felt like a dimwit.
RELATED WORDS
OTHER MEANINGS
2. A silly or foolish person who often makes careless mistakes.
Don't be a dimwit and leave your keys in the door.
3. A playful insult for someone who does something clumsy or forgetful.
You dimwit, you put the milk in the cupboard again!
4. A person lacking quick understanding or common sense.
The dimwit in the story kept losing his hat.