そうはイカの金きん玉たま

expression

you wish!; that's not going to happen; not a chance

A jocular, punning phrase used to dismiss someone's hopes or plans. It plays on the similarity between そうは行かぬ (that won't do) and そうはイカの金玉 (that's a squid's testicles), creating a humorous, slightly vulgar rejection.

• 「今こん度どこそ宝たからくじが当あたるよ！」「そうはイカの金きん玉たまだね。」

  "I'm going to win the lottery this time!" "Yeah, you wish!"

• 彼かれが謝あやまるなんて、そうはイカの金きん玉たまだよ。

  Him apologizing? Not a chance.