blow someone's brains out
informal Kill someone with a shot in the head: her third husband had blown his brains out...- I just think that someone might consider blowing his brains out for ironic humor's sake.
- Wanting to ‘blow someone's brains out’ sounds like the words of someone who has the temperament of a mobster.
- The military are busy here as they are in all corners of the world upholding the conventions of war which allow them to blow someone's brains out with a sniper rifle at 100 yards but not with a pistol at one yard.
See parent entry: blow