black sheep
noun /ˌblæk ˈʃiːp/
/ˌblæk ˈʃiːp/
[usually singular]- a person who is different from the rest of their family or another group, and who is considered bad or embarrassing
有辱家族的人;害群之马 - the black sheep of the family
家族败类
词源late 18th cent.: from the proverb there is a black sheep in every flock. - the black sheep of the family