n. phr. A person who pretends to be good but really is bad. Mrs. Martin trusted the lawyer until she realized that he was a wolf in sheep's clothing. Mr. Black was fooled by the salesman's manners until he showed that he was really a wolf in sheep's clothing by selling Mr. Black a car that was falling apart.
WOLF IN SHEEP'S CLOTHING
Meaning of WOLF IN SHEEP'S CLOTHING in English
American idioms English vocabulary. Английский словарь американских идиом. 2012