He's basically bullshitting.

他在胡说八道。

《柯林斯英汉双解大词典》

She's just bullshitting.

她不过是在瞎扯。

《牛津词典》

But if she was bullshitting me, then in a way it's a ray of hope.

但是如果她是在跟我扯屁，从某个角度而言，就是一线希望。

youdao