it's no good doing something
idiomPart ofgood
it's no good doing something — idiom
1. Used to say that a particular action will not produce the desired result and is
1.idiom
Definition
Used to say that a particular action will not produce the desired result and is therefore pointless.
Example
It is no good crying over a broken cup — just buy a new one.
It is no good telling Jack to hurry because he never listens.