a style, activity, or interest that is very popular for a short period of time
The hula hoop was a fad for a few years, but it soon lost its popularity.
Fad diets often promise quick weight loss but may not be sustainable in the long term.
The latest fashion fad seems to involve oversized sunglasses and vintage clothing.
In the world of technology, what's considered cutting-edge today can become a fad tomorrow.
Many social media challenges quickly become fads, gaining immense popularity and fading away just as fast.
