Script (guión): Idioms, ‘black sheep’. If someone is the black sheep, they don't fit into a group or family because their character or behaviour is not as good as the others. A friend of mine, Paul, is considered the black sheep in his family because he is the only one who didn't go to university. For many years he felt a little bad about this. However, he started his own business and became very successful and now, he is the only one driving a Porsche.