(idiomatic) Fearing the consequences of repeating an act, especially after being reprimanded.
Example: Being afraid to use a gun.
Frightened by the sound of gunfire.
2007, Paul Long, Training Pointing Dogs, 2nd edition, page 38:
But very few dogs become gunshy if they are introduced to the bang while they are overcome with the delight of chasing game, particularly if the trainer begins with a light noise and works up to louder noises in easy stages
After his last suggestion was laughed at by his colleagues, he was gunshy about making another suggestion.