What did you say just now? It sounded like you said XX. What does that mean?
What was that word you said just now? I thought I heard XX. What does it mean?
この場合、次のように聞くと良いですよ。
ーWhat did you say just now? It sounded like you said XX. What does that mean?
「今なんて言った?XXって聞こえたけど。どういう意味?」
ーWhat was that word you said just now? I thought I heard XX. What does it mean?
「今言った単語って何?XXって聞こえたけど。それってどういう意味?」
ご参考まで!
Could you repeat what you just said now? It sounded like you said ○○. Can you explain the meaning?
ご質問ありがとうございます。
この場合、「今なんて言った?*みたいに聞こえたけど?[どういう意味](https://eikaiwa.dmm.com/uknow/questions/130185/)?」と言いたいなら英語で「Could you repeat what you just said now? It sounded like you said ○○. Can you explain the meaning?」と言えます。
ご参考になれば幸いです。