Wouldn't hurt a fly
Meaning
To describe someone as extremely gentle, mild-mannered, and completely incapable of harming another living being.
Origin
The humble fly, often swatted without a second thought, serves as the ultimate test of gentleness in this enduring idiom. Emerging in the English language as early as the late 18th century, the phrase plays on the common human inclination to dismiss or even harm small, irritating creatures. By asserting that someone 'wouldn't hurt a fly,' the speaker paints a picture of exceptional mildness, a character so inherently benevolent and non-violent that they would extend compassion even to the most insignificant and easily dispatched living being. It's a testament to profound harmlessness, contrasting sharply with the ease with which one might simply flick away an insect.
Examples
- My grandmother is such a sweet woman; she wouldn't hurt a fly.
- Despite his large stature, the security guard was known to be so kind-hearted he wouldn't hurt a fly.