Wolf in sheep's clothing

Meaning

Someone pretending to be harmless but dangerous.

Usage

Used for deceitful people masking intentions.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Biblical metaphor warning against false prophets.

Appears in Matthew 7:15 and has been a staple warning in sermons.