そんなばかな

Meanings

1

expression, noun-modifying (irregular)

such a stupid ...; what a crazy ...

Used as a prenominal phrase to express disbelief or criticism about something absurd. Often followed by a noun like 話 (story) or こと (thing).

そんなばかな話はなしがあるわけない。
There's no way such a stupid story could be true.
彼かれがそんなばかなことをするなんて信しんじられない。
I can't believe he would do such a crazy thing.

2

no way!; what nonsense!; how can that be?

usually written using kana alone

An interjection expressing strong disbelief, shock, or rejection of an idea. Often used in response to surprising or absurd statements.

「明日あしたから会かい社しゃが休やすみだって」「そんなばかな！」
"They say the office is closed from tomorrow." "No way!"
そんなばかな、そんなことあるはずがない。
What nonsense! That can't possibly be true.