"That story will raise a few eyebrows."
"that story" 「その話は」
"will raise ~" 「〜あげる」
"a few eyebrow" 「眉毛数本」
"will raise a few eyebrows" 「眉唾ものだ」という意味です。
[これも](https://eikaiwa.dmm.com/uknow/questions/76197/)役に立つかもしれませんので是非クリックしてください。
That story seems a bit hard to believe. I think it will raise a few eyebrows.
That story leaves a lot of unanswered questions.
ご質問ありがとうございます。
「[その話](https://eikaiwa.dmm.com/uknow/questions/48841/)は眉唾ものだ」は英語で「That story seems a bit hard to believe. I think it will raise a few eyebrows.」と言います。
また、別の言い方ですが、「That story leaves a lot of unanswered questions.」でも言えます。相手の疑わしい話しだよと