wouldn't hurt a fly
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Related to wouldn't hurt a fly: at least, fly the coop, touch base, at the expense of, take it for granted, flies in the face
not hurt a fly
To harm nothing or no one. Said of one who is particularly gentle, shy, diffident, or timid by nature. My brother is a very sweet, warm-hearted man who wouldn't hurt a fly. How can you suspect him of committing this crime?
wouldn't hurt a flyor
wouldn't harm a fly
If someone wouldn't hurt a fly or wouldn't harm a fly, they are very kind and gentle. She was such a lovely girl, who wouldn't have hurt a fly. He is, he insists, a pacifist, who would not harm a fly.