世界再好也是有小三的
[shì jiè zài hăo yĕ shì yŏu xiăo sān de]
This nickname reflects a jaded outlook on love or human relations. Despite a wonderful world ('世外桃源'), there can still be infidelity or betrayal (referring colloquially to a 'third party' in a romantic context) suggesting a lack of total trust in goodness.