相席（あいせき,） means “sharing a table with someone you don’t know (e.g. at a restaurant)” (Takoboto).
What other fun words have you all encountered that just don’t translate well to English or require a short explanation?
I’d like to make a sentence that’s very long in translation, and/or read a silly sentence like that.
Oh! Thank you for stopping me making a complete fool of myself!
(In the outer world, behind my own face, that is. I’ve already done it here!)