"one who practices an affected attitude," 1881, agent noun from pose (v.1); revived in teen-ager slang by 1983. Meaning "question that puzzles" is from 1793 from pose (v.2); earlier it meant "one who asks testing questions" (1580s).
权威例句
1. Here is a little poser for you.
考你一道小智力题。
2. He's such a poser.
他太做作。
3. The dilemma presented quite a poser.
困境给人很大的难题.
4. Who does she think she is A movie star? What a poser!