自己咬自己真是傻
[zì jĭ yăo zì jĭ zhēn shì shă]
Zi Ji Yao Zi Ji Zhen Shi Sha (自己咬自己真是傻) means 'Biting Oneself is Truly Stupid'. It humorously expresses the futility or self-harm of certain actions. Often used in context where someone feels they've done something self-defeating or nonsensical.