せんばんにいちばんのかねあい

千番に一番の兼ね合い

表記・読み：千番に一番の兼合・せんばんにいちばんのかねあい

1. 1

   something so difficult that one doesn't know if there's even a 1 in 1000 chance of success

   expressions (phrases, clauses, etc.)rare term