rude person; insolent person
A somewhat old-fashioned or literary term for someone who is impudent or disrespectful. Not commonly used in modern casual speech.
He was called a rude person for his behavior toward his superiors.
Compound of 慮外 (ryogai, 'unexpected; beyond consideration') + 者 (mono, 'person'). The exact historical derivation is uncertain, but it likely originated as a term for someone who acts outside the bounds of proper consideration.