楽がく屋や落おち

noun

shoptalk; insider talk

Originally theater jargon for talk that only makes sense to performers backstage; now used for any conversation or joke that outsiders cannot follow.

• 彼かれらの会かい話わは楽がく屋や落おちで、部ぶ外がい者しゃにはさっぱりわからなかった。

  Their conversation was full of shoptalk, and outsiders couldn't understand it at all.

noun

inside joke; private joke

A joke that only a specific group understands, often because it relies on shared experiences or knowledge.

• あの冗じょう談だんは完かん全ぜんに楽がく屋や落おちで、他ほかの人ひとは誰だれも笑わらわなかった。

  That joke was a complete inside joke, and no one else laughed.