一刀捅死我说是手哆嗦一枪崩了我说是枪走火
[yī dāo tŏng sĭ wŏ shuō shì shŏu duō suō yī qiāng bēng le wŏ shuō shì qiāng zŏu huŏ]
'If I stabbed you, I'd say it's because of a trembling hand; if I shot you, I'd say it was because the gun fired by accident.' It suggests that some individuals are irresponsible or try to evade responsibilities or blame by giving excuses, even ones that clearly don't make sense. A kind of sarcastic or self-deprecatory humor.