Definition of みなまでいうな
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(exp) don't finish what you're saying; stop what you're saying
「聞いたよ、光一」「まあ皆までいうなって。分かってる。神社の夏祭りの一件でしょ?」
"I've heard about it, Koichi" "You don't need to say anything more, I know. It's the summer festival incident at the shrine, right?"