狼心狗肺的回忆
[láng xīn gŏu fèi de huí yì]
This phrase mixes traditional Chinese idioms to create a powerful and vivid picture of painful memories; '狼心狗肺' (dog-hearted wolf's lungs) implies betrayal and treacherous nature, making it so the memories associated are bitter and full of deception or harsh treatment from others.