Water off a duck's back
Meaning
Let criticism or trouble slide without effect.
Usage
Encourages resilience to negativity.
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.
Water rolls off ducks' feathers without wetting the bird.
Used in English folk expression since the 19th century.