掏心掏肺到没心没肺
[tāo xīn tāo fèi dào méi xīn méi fèi]
This name '掏心掏肺到没心没肺' conveys a deep emotional expression that the person is totally open-hearted and willing to be fully honest or loyal, even to the point of not caring or being oblivious. It's an exaggeration used often to imply extreme dedication in relationships or towards friends.