a wolf in sheep's clothing

The phrase "a wolf in sheep's clothing" refers to a person or thing that appears friendly, harmless, or innocent on the surface but actually conceals hostile intentions or malicious nature. It suggests that something or someone is disguised to deceive others, often for personal gain or to cause harm. Just as a wolf disguising itself with the skin of a sheep can approach a flock undetected, this metaphor implies that individuals or objects can be deceitful, pretending to be harmless or trustworthy while concealing their true nature, motives, or intentions.