Expressions (phrases, clauses, etc.), Ichidan verb
to make a leap into the dark; to take the plunge; to jump in at the deep end; to jump off the veranda of the Kiyomizu temple
Idiomatic expression
私は清水の舞台から飛び降りる気持ちで南米に渡ります。I am going to take a big chance by migrating to South America.
Also written 清水の舞台から飛び下りる【きよみずのぶたいからとびおりる】