对你掏心掏肺嫌我有鱼腥味
[duì nĭ tāo xīn tāo fèi xián wŏ yŏu yú xīng wèi]
This implies a situation where the person has poured out their heart to someone (sincerely confided in them) only to be rebuked or treated unfavorably as if what was shared is repulsive or undesirable, symbolically comparing genuine feelings to the fishy smell others find unlikable.