お里さとが知しれる

expression, ichidan verb

reveal one's poor upbringing; betray one's origin; give oneself away

Used when someone's behavior, speech, or manners unintentionally show a lack of refinement or a humble background. Often carries a critical or mocking tone.

• 彼かれは言こと葉ば遣づかいでお里さとが知しれる。

  His way of speaking reveals his poor upbringing.

• テーブルマナーを見みれば、お里さとが知しれるというものだ。

  You can tell someone's background by their table manners.