ridiculous answer; absurd response; boner
Refers to an answer or response that is so off-target or foolish that it is laughable. Often used in quiz or test contexts.
On the quiz show, he fired off one ridiculous answer after another.
I wrote a boner on the exam and felt embarrassed afterwards.
Compound of 迷 (mei, 'bewilderment, perplexity') and 答 (tō, 'answer'). The exact origin is uncertain, but it likely arose as a playful or critical term for a bewilderingly wrong answer.