blow someone’s brains out

blow (one's) brains out

slang To fatally shoot someone in the head. Ray blew the informant's brains out, just as the boss told him to.
See also: blow, brain, out
Farlex Dictionary of Idioms.

blow someone’s brains out

tv. to kill someone with a gun. Harry the Horse was so depressed that he wanted to blow out his brains.
See also: blow, brain, out
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • blow (one's) brains out
  • blow brains out
  • blow one's brains out
  • blow your/somebody's brains out
  • do someone or something justice
  • go through someone like a dose of salts
  • do a job on someone From do a number on something.
  • ain’t 1
  • have a head
  • helluva someone/something