A clogged sewage pipe that doesn't clear well, but even high-pressure washing doesn't clear it...

[@hanshin_1001]

汚水管の中に溜まってるのは🙄💬
汚水かん？
🙄🙄🙄🙄🙄

[@user-yamakawasetubi]

コメントありがとうございます。
久々のダジャレですね。