Tīng bù chū tā shuō de shì fǎnhuà, nǐ tài shízài le.
You can't tell she was being sarcastic — you're too literal-minded.
Tips
usage
反话 literally means reverse/opposite speech. It covers both gentle irony and cutting sarcasm. Compare with 讽刺 (fěngcì), which is more pointed satirical criticism.
