Meaning of 皆まで言うな(みなまでいうな) in Japanese

Examples of 皆まで言うな, みなまでいうな in a sentence

• 「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?"