rude person; insolent fellow
A somewhat old-fashioned or literary term for someone who is impolite or disrespectful. Often used in historical or dramatic contexts.
I cannot forgive that insolent fellow.
In period dramas, a samurai called a rude fellow often appears.
Compound of 無礼 (burei, 'rudeness') + 者 (mono, 'person'). The exact historical derivation is uncertain, but the word follows a common pattern for labeling a person by a quality.