筒つつ抜ぬけ

noun

being overheard; leaking out; being an open secret

Describes a situation where a conversation, plan, or secret is easily heard or known by others, often unintentionally. Commonly used in phrases like 筒抜けになる or 筒抜けだ.

• 隣となりの部屋へやに話はなしが筒つつ抜ぬけだった。

  Our conversation was completely overheard in the next room.

• 会かい社しゃの内ない情じょうがライバル企き業ぎょうに筒つつ抜ぬけになっている。

  The company's internal affairs have become an open secret to rival firms.

noun

going in one ear and out the other; not registering

Used when someone hears something but pays no attention or immediately forgets it, as if the information passes straight through without being absorbed. Often appears in the set phrase 聞いても筒抜け.

• 彼かれに注ちゅう意いしても筒つつ抜ぬけだ。

  Even if I warn him, it goes in one ear and out the other.