Meaning of “Oshikatsu(推し活)”
“Oshikatsu(推し活)” means activity to support own oshi(推し).
In this case, “katsu(活)” is an abbreviation for “katsudou(活動)” which means activity.
This word is nominated for Japan buzzword award in 2021.
A: This year was also indoor life because of COVID-19. What did you do in your home?
B: Absolutely, Oshikatsu(推し活)!! I can do it online!!
A: I envy you, having “Oshi(推し)” makes your life happier.