An emphatic expression of denial or disbelief: 'No way', 'That can't be true', or 'You must be kidding'.
彼がプロジェクトを一人でやったって？それはないよ。
He did the whole project by himself? No way.
彼女が試験に一切勉強しなかったのに満点だったって？それはないよ。
She got a perfect score even though she didn't study at all? Come on, that's not possible.
会社のメンバー全員が辞めたらしいって話？それはないでしょ。
Rumor says the entire staff quit? That can't be true.