oshiete

Japanese for "tell" or "explain"
In the anime community it's often used as a reference to the song "Unravel" from the anime Tokyo Ghoul. The first word of the song is oshiete, and a lot of people know it.

Friend1: I'm pretty much fluent in Japanese.
Friend2: Oh really?! That's so cool, can I hear some?
Friend1: oshiete oshiete sono shikumi wo...

oshiete

A word that can be used when youre favorite character dies and you need to pay respects. Works especially with Tokyo Ghoul.

- I just finished watching Tokyo Ghoul Root A. The ending is so sad.

- Oshiete.

oshiete

Another word for "oh shit". Used by anime lovers who've watched tokyo ghoul. Sometimes they also sing the whole opening.

Person: "oh shi-"
Me: "OSHIETE OSHIETE YO SONO SHIKUMI WO"