A slip of the tongue with 滑らせてしまった

Manga panel from 名探偵コナン showing example of A slip of the tongue with 滑らせてしまった.
名探偵コナン » Volume 11 » Page 140

A flat tire and rain send Kogoro, Ran, and Conan to a nearby temple. The priest invites them to stay overnight, but warns them about the Mist Tengu. That night, they dine along with the monks training there. Conan takes an opportunity to ask about the Mist Tengu, catching the monks off guard.

寛念(かんねん):
「ボ、ボウヤどこでそれを!?」
“K-kid, where did you hear that!?”
天永(てんえい):
「スマン、スマン ワシが(くち)(すべ)らせてしまったんじゃ…」
“Sorry, sorry. I let it slip...”

Key Points

1(くち)(すべ)らせる means to let something slip
  • Tenei admits that he said something he should have kept to himself. The expression describes an accidental disclosure.
  • (すべ)る means to slip, and its causative form is (すべ)らせる. With (くち)を, the image is letting one’s tongue slip. Ten’ei is talking about his own speech.
2〜てしまった adds regret about what happened
  • (すべ)らせて is the て-form of (すべ)らせる, followed by しまった. Here, the past form and the apology present the disclosure as an unfortunate mistake that has already happened.
3んじゃ explains why Conan knows
  • Here, んじゃ corresponds to んだ, the casual form of のだ. Ten’ei supplies the explanation for Conan’s knowledge.
  • じゃ in place of だ and ワシ for “I” give Ten’ei an elderly man’s voice. スマン is a casual apology corresponding to すまない.
4どこでそれを!? leaves the verb unsaid
  • Kannen’s question can be filled out as どこでそれを()いた, “Where did you hear that?” それ refers to what Conan has just brought up.
  • ボ、ボウヤ is a startled, stammered address to Conan. ボウヤ means “little boy” or “kid”.

See Also

名探偵コナン © its respective creators. It is used here for educational commentary.