心贴心

Traditional (Taiwan): 心貼心

xīntiēxīn ㄒㄧㄣ ㄊㄧㄝ ㄒㄧㄣ

    • emotionally close
    • understanding and trusting each other completely

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
heart pressed to heart
Meaning
Being emotionally close, understanding and trusting each other completely. Approving.

Sources