1. What does it mean?
답정너 compresses 답은 정해져 있고 너는 대답만 하면 돼. It describes a question framed as open discussion even though the asker only welcomes confirmation of their preferred answer.
Also written or said as dapjeongneo
2. The nuance
It can criticize a conversational pattern without applying to every request for reassurance. The label is gender-neutral; 너 means 'you,' not a particular type of person.
3. Examples
“둘 중에 고르라더니 계속 파란 것만 칭찬하네. 답정너였어?”
You asked me to choose but keep praising the blue one. Had you already decided?
“오늘 점심은 내가 답정너였네. 처음부터 국수 먹고 싶었어.”
I guess I only wanted one answer about lunch. I wanted noodles from the start.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.