本人多半有病
[bĕn rén duō bàn yŏu bìng]
A sarcastic or self-mocking expression meaning 'I must be sick,' suggesting one knows they have some kind of (mental) issue or unhealthy behavioral pattern that leads to irrational thinking or actions. It’s sometimes also a humorous or self-ridiculing phrase used by people who are perfectly normal to describe moments when they behave strangely.