我的心曾喂过狗
[wŏ de xīn céng wèi guò gŏu]
'My Heart Has Been Given to Dogs' idiomatically conveys heartache or the sentiment of pouring affection into something or someone which proved unfruitful. Essentially, it signifies disappointment and wasted emotion, drawing on the idea that giving away one's heart to unworthy recipients (here metaphorically dogs).