はや流行hayaru
1.

To gain widespread acceptance and popularity among a large number of people for a certain period, often seen in cultural trends or fashion.

2.

To experience a rapid increase in occurrence or prevalence, particularly related to diseases or unfavorable situations impacting a large population.

3.

To thrive or prosper, often indicated by a significant influx of customers or business activity, reflecting successful engagement with current trends.

4.

To act impulsively or with heightened emotion, often leading to a loss of calmness or rationality in decision-making.

Example:

「性差別」という言葉が今、流行っている。