今、若者の間でこの曲が流行りだ。
This song is all the rage among young people right now.
That trendy clothing quickly fell out of favor.
noun, noun which may take the genitive case particle 'no'
prevalence (e.g. of a disease)
Used for the spread or prevalence of something, especially diseases or phenomena. Often seen in news or medical contexts.
The prevalence of influenza has peaked.
Tapioca drinks became trendy starting last year.
When winter comes, the spread of the flu becomes a concern.
She's always quick to jump on the latest trend.
Young people tend to chase after trends.
fashionable thing; popular thing; craze
epidemic; plague