空くう前ぜん絶ぜつ後ご

noun, noun which may take the genitive case particle 'no'

unprecedented and unrepeatable; first and last

Used for events or things so extraordinary (either wonderful or terrible) that nothing like it has happened before and probably never will again. Often appears in news or dramatic descriptions.

• あの選せん手しゅの記き録ろくは空くう前ぜん絶ぜつ後ごだ。

  That athlete's record is unprecedented and unlikely to be broken.

• これは空くう前ぜん絶ぜつ後ごの大だい災さい害がいと言いわれている。

  This is said to be a disaster of unprecedented and unrepeatable scale.