wouldn't hurt a fly
informalIf you say that someone wouldn't hurt a fly, you mean they are gentle and would not do anything to injure or offend anyone.
Thesaurus: synonyms and related words
Tender & gentle
- fly
- gentle
- gently
- meek
- mild
- mild-mannered
- mildly
- soft
- soft-hearted
- softly
- tender
- tender-hearted
- TLC