that's no good, is it?; not good, right?
Interjection used to express disapproval or to seek agreement that something is not good. Often used in casual conversation.
This plan is no good, is it?
That movie wasn't good, right?
That post got a lot of dislikes.
It's easy to press the thumbs-down.
Phrase formed from 良くない (negative of 良い, 'good') plus the sentence-ending particle ね. The social media noun sense is a direct extension of the interjection, used as a label for a negative reaction.