buzzword; vogue word; popular phrase
Refers to a word or phrase that becomes widely used for a period, often reflecting current trends or social phenomena.
This year's buzzword of the year was announced.
「エモい」は若者の間で流行語になった。
"Emoi" became a buzzword among young people.
That phrase became a buzzword last year.
That TV drama coined a new buzzword.
Last year's buzzword has already fallen out of use.