じわる(jiwaru)

Jiwa= jiwa jiwa means gradually.
ru= suru/kuru

So, jiwaru is to understand gradually.
If you understand a joke after a while ,then you can say "that joke is jiwaru".

おしゃかわ（oshakawa)

osya=oshare means fashionable
kawa=kawaii means cute

So おしゃかわ is fashionable and cute.
e.g. That shop looks oshakawa.

推し(oshi)

~oshi=favorite

There are many idol groups in Japan.
And people use this word for favorite person or character in the group.

e.g. My Oshi is ~~ in this group.

タピる(tapiru)

tapi=tapioka drink(bubble drink) ru=~suru(Japanese "do")

Recently there is a huge boom in tapioca drinks in Japan.
So people use this word to say "I will drink bubble tea," or "I'm drinking bubble tea."

ワンチャン（wan chan)

wan=one, chan=chance

So this sounds like "I can get one more chance".
But usually people use this word like "maybe".

"wan chan" You can win.
You might win.

皇居ランナー (koukyo rannaa)

koukyo= the Imperial Palace, rannaa= runner

Recently many people run around the Imperial Palace in Tokyo.

The peak times about 5000 runners are running around there.

So now there are rules for running- like you can run only counterclockwise and only on the left side and so on.

あげぽよ (age poyo)

age= short version of "age age" means more excitement (at club with DJ and so on)

poyo= no meaning just sonds cute?

First Japanese high school girls created and used this word.

And now it has become more popular.

You can use this on occasions like a drinking party "I'm having a fun so much!"

But usually only teenagers can use this word without embarrassment.