N-COUNT
（引人注意或关注的）噱头，花招
A gimmick is an unusual and unnecessary feature or action whose purpose is to attract attention or publicity.
例句
It is just a public relations gimmick...
这只不过是一种公关伎俩。
The exhibition is informative, up to date, and mercifully free of gimmicks.
这个展览既能让人增长见识，又紧跟时代前沿，而且幸运的是没有华而不实的东西。