Meaning of the word "not hurt a fly" in English

What does "not hurt a fly" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

not hurt a fly

US /nɑt hɜrt ə flaɪ/
UK /nɑt hɜrt ə flaɪ/
"not hurt a fly" picture

Idiom

1.

to be gentle and harmless; to be incapable of causing harm to anyone or anything

Example:
Despite his tough appearance, he wouldn't hurt a fly.
My grandmother is so sweet; she wouldn't hurt a fly.
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