地じが出でる

expression, ichidan verb

reveal one's true self; show one's real character

Used when someone's hidden personality, habits, or background unintentionally comes out, often in informal or unguarded situations.

• 酔よっ払ぱらうと、つい地じが出でる。

  When I get drunk, my true self comes out.

• 彼かれは普ふ段だんはおとなしいけど、ゲームになると地じが出でる。

  He's usually quiet, but his real character shows when it comes to games.