不折不扣的傻子彻头彻尾的疯子
[bù zhé bù kòu de shă zi chè tóu chè wĕi de fēng zi]
Literally 'an undisputed fool and thorough crazy'. This self-depreciation refers to someone so committed to a decision that others consider foolish, or who has given up on fitting societal norms. It’s also sometimes said jokingly but it can have negative implications.