expression, i-adjective
I don't give a damn; that's got nothing to do with me; I wouldn't know
Colloquial, emphatic phrase expressing complete indifference or disavowal of knowledge or responsibility. Derived from 知ったことではない. Often used in casual, sometimes confrontational speech.
See also: 知ったことではない
あいつが何をしようと、知ったこっちゃない。
I don't give a damn what that guy does.
そんなこと、知ったこっちゃないよ。
That's got nothing to do with me.