心酸涩
[xīn suān sè]
This nickname conveys a feeling of bitterness and pain. The Chinese character '心' means 'heart', '酸' stands for 'sourness, acidity or sorrowful experiences in this context, often associated with heartache,' and '涩' also refers to an astringent taste but metaphorically means something hard or awkward, which here represents the uncomfortable and painful emotions.