A person who is ignorant or lacks knowledge; someone who is stupid or uninformed.
From Latin 'ignoramus,' literally meaning 'we do not know.' It was the name of a character in a 17th-century play about foolish lawyers, and the term became popularized as a general insult for an ignorant person.
The word 'ignoramus' has an amazing history—it comes from an actual play by George Ruggle in 1615 called *Ignoramus* about incompetent lawyers, and it was so popular that the character's name became a common insult that's lasted 400+ years!
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