“A wolf in sheep’s clothing” is a very old expression about deception. It describes a person who seems gentle, innocent, or trustworthy but is actually harmful. The image is memorable: a wolf disguises itself as a sheep so others will not notice the danger.
The idea appears in one of Aesop’s fables, where a wolf dresses in a sheep’s skin to get close to the flock. It also became widely known through the Bible, in Matthew 7:15, which warns people about false prophets who come “in sheep’s clothing” but are really dangerous underneath.
Today, people use the phrase more broadly for anyone who hides bad intentions behind a friendly appearance.
- A scammer who acts helpful to gain trust
- A public figure who seems kind but behaves cruelly
- A dishonest person who pretends to be sincere
The expression remains popular because its meaning is still useful: looks can mislead. Someone may appear safe or good while hiding motives that are selfish, dishonest, or destructive.