騎き虎この勢いきおい

expression, noun

having no choice but to carry on; unable to stop halfway

Idiomatic expression meaning one is in a situation where stopping is impossible and must continue regardless of the consequences. Literally 'the momentum of riding a tiger', originating from the Book of Sui.

• 事じ業ぎょうはもう騎き虎この勢いきおいで、途と中ちゅうでやめるわけにはいかない。

  The business has already gained unstoppable momentum; we can't quit halfway.

• 彼かれは騎き虎この勢いきおいで、その計けい画かくを最さい後ごまで押おし進すすめた。

  He pushed the plan through to the end with the momentum of a man riding a tiger.