把心给你了你却嫌它腥
[bă xīn jĭ nĭ le nĭ què xián tā xīng]
Giving heart out wholeheartedly and sincerely, yet instead of being treasured, this sentiment received complaints and rejection, metaphorically 'gave you my heart, but you detested its bloody smell'. It depicts unappreciated or rejected love.