你条畜生已久焚我心了
[nĭ tiáo chù shēng yĭ jiŭ fén wŏ xīn le]
This nickname translates roughly to 'You have been burning my heart like an animal for a long time.' It implies intense frustration or anger towards someone who has deeply hurt the person using this name. The language used here can be seen as very informal and even offensive.