also: サルがお
noun
monkey-like face; simian features
Describes a person whose facial features resemble a monkey's, often with protruding ears, a receding chin, or a wide mouth. Used informally and sometimes humorously.
彼は自分で猿顔だと言っている。
He says he has a monkey-like face himself.
あの俳優は猿顔で親しみやすい。
That actor has simian features and is approachable.
Compound of 猿 (さる, monkey) and 顔 (かお, face), with rendaku voicing of かお to がお. The word straightforwardly describes a monkey-like facial appearance.