Question

expansion of Idea on it is of no use crying over spilt milk

Answer 1

Usually found as a negative imperative: don't cry over spilt milk or there's no use crying over spilt milk.

Answer 2

The phrase, “No use crying over spilt milk” is a phrase that can be traced back for its origins to the mid 19th century.

The phrase utilizes the use of Milk and spilling.

It is common knowledge that once milk is pilled than there is nothing that can be done about it, and therefore crying or worrying over it is futile, as it is irreversible.

So what is being implied here is that there is no point lamenting over a happening that has transpired and is irreversible