
Ignoramus
Often Pejorative
Usually used negatively to express disapproval of someone's lack of knowledge or education.
The committee treated him like an ignoramus because he hadn't done his homework.
Can Sound Arrogant
Calling someone an ignoramus might make you seem arrogant or conceited.
When she called him an ignoramus, it sounded more like arrogance than a factual description.
Use Sparingly
Because it's an insult, use it carefully to avoid offending people unintentionally.
Even if you think it’s true, calling your debate opponent an ignoramus isn't polite.