hell to pay

idiomatic uncountable

(idiomatic) Very unpleasant consequences; a great deal of trouble.

Japanese Meaning

非常に厄介な問題・大変な結果に直面する状況 / 取り返しのつかない事態に陥ること

If you ignore the safety warnings, there will be hell to pay when something goes wrong.

安全警告を無視すれば、何か問題が起きたときにとんでもないことになるだろう。

Sense（1）

(idiomatic) Very unpleasant consequences; a great deal of trouble.

"When I'm hungry, there's hell to pay if I'm not fed quick."