clothing

A person or thing that appears harmless but is actually dangerous or bad. Don't trust Dana—she's a wolf in sheep's clothing who will try to steal your position if given the chance. The politician portrayed himself as moderate, but turned out to be a wolf in sheep's clothing with a radical agenda.

Fig. a dangerous person pretending to be harmless. Carla thought the handsome stranger was gentle and kind, but Susan suspected he was a wolf in sheep's clothing. Mimi: Why shouldn't I go out with David? He's the nicest man I've ever met. Alan: He's a wolf in sheep's clothing, Mimi. Can't you tell?

someone or something that seems to be good but is actually bad The financial advisor we hired turned out to be a wolf in sheep's clothing who stole from the people he promised to help.

someone who seems to be pleasant and friendly but is in fact dangerous or evil My next boss, on the surface very warm and charming, proved to be something of a wolf in sheep's clothing.

An enemy disguised as a friend, as in Dan was a wolf in sheep's clothing, pretending to help but all the while spying for our competitors . This term comes from the ancient fable about a wolf that dresses up in the skin of a sheep and sneaks up on a flock. This fable has given rise to a rich history of allusions as in the Sermon on the Mount when Jesus speaks of false prophets in sheep's clothing, "but inwardly they are ravening wolves" (Matthew 7:15).

One who feigns congeniality while actually holding malevolent intentions.