not harm a fly

Meaning

1. not harm / hurt a fly

   to be kind and gentle and unwilling to cause unhappiness

From the same entry

• fly the coop
• fly high
• fly in the face of
• fly into a rage, temper
• fly a kite
• fly the nest
• fly off the handle
• go flying
• let fly
• the bird has flown
• as the crow flies
• fly the flag