Meaning of 鬼が出るか蛇が出るか in Japanese
Definition of 鬼が出るか蛇が出るか
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(exp) You never know what might happen
鬼が出るか蛇が出るか。この提案書の結果が見物だね。
There's no telling what kind of trouble this proposal might stir up. The result is certainly going to be something to see.