掏心掏肺 - Chinese Idiom

掏心窝子

Literally means:

repose full confidence in someone

Actually means:

confide in someone

掏 means taking out.

This phrase figuratively means being very sincere and honest to other people, or being frank and sincere in speech and action. Commendatory。

掏，往外拿。

掏心窝子，形容对人诚恳直率，或做事说话十分坦诚。具有褒义色彩。