wouldn't hurt a fly

Meaning: Is very gentle and harmless.

Language: English

Literally: (Already vivid in English)

Example: “Our huge dog looks scary, but he wouldn't hurt a fly.”

Category: Animals

Origin: A fly is the smallest and most commonly swatted creature, so someone who spares even it is harmless. The phrase is common from the 19th century.

Equivalents in other languages

More idioms — Animals

More English idioms

From our compliments & insults

  • Peau de vache — A mean, difficult, and unpleasant person — tough and unyielding like tanned hide.
  • Eres un aguafiestas — You're a killjoy — you pour cold water on everyone's fun the moment you arrive.
  • ¡Qué cara más dura! — You've got incredible nerve and cheek — the audacity is almost impressive.

Browse all compliments & insults →

← Back to Idioms