1. To be worthless, futile, or of no use. I'm telling you, it's no good complaining to a receptionist—you need to get a manager on the line.
2. To be poor or unsatisfactory in quality. I'm sorry to be blunt, but your writing is no good.
be no ˈgood
,
not be any/much ˈgood
1 not be useful; have no useful effect: This gadget isn’t much good.It’s no good trying to talk me out of leaving. 2 not be interesting or enjoyable: His latest movie isn’t much good.