ghost bullet

1. A bullet that is shot by an unseen assailant or one that cannot be seen or heard when it is shot.

2. A bullet that cannot be found or that is untraceable through ballistic testing.

3. An imaginary bullet.

4. A supernatural bullet that wounds or kills a person, especially one that is shot by a supernatural assailant.

5. A bullet that can hurt a ghost or undead creature.

6. (figuratively)Something nonphysical (such as words, actions, or memory) that causes physical or emotional damage.

regular