beat (someone's) brains in(redirected from beat one's brains in)
beat (someone's) brains in
To strike or assault someone violently and severely, typically on the head, such that it may cause the person severe injury or death. Primarily heard in US. I warned her that I was going to beat her brains in if she didn't stop insulting me. They left him to die after nearly beating his brains in.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.