冗じょう談だん事ごと

noun

joking matter; something to joke about

Often used in negative or questioning contexts to say something is not a laughing matter.

• 彼かれの話はなしは冗じょう談だん事ごとでは済すまされない。

  His story is not something that can be dismissed as a joke.

• こんな時ときに冗じょう談だん事ごとを言いっている場ば合あいじゃない。

  This is no time to be joking around.