'Good for nothing' in the Bible

"You are the salt of the earth. But if salt becomes tasteless, by what will it be made salty? It is good for nothing any longer except to be thrown outside [and] trampled under foot by people.

But I tell you, that everyone who is angry with his brother shall be in danger of the judgment; and whoever shall say to his brother, 'You good-for-nothing.' shall be in danger of the council; and whoever shall say, 'You fool.' shall be in danger of the fire of hell.

And throw out the worthless servant into the outer darkness; in that place [of grief and torment] there will be weeping [over sorrow and pain] and grinding of teeth [over distress and anger].