be brain dead

be brain dead

1. Literally, to lack brain activity, as after a brain injury. After the car accident, Kendra was brain dead. Despite the surgeon's best efforts, the patient was brain dead.
2. slang To be so mentally exhausted or lacking focus that one does something poorly and/or makes easily avoidable mistakes. Did I just say that two plus two equals five? Wow, I'm really brain dead today.
See also: brain, dead
References in periodicals archive ?
The new laws also allow a person to be an organ or tissue donor if they die in an automobile accident or are certified to be brain dead.
You can either be mindful of what you put into your mouth or be brain dead and let the drug companies decide for you.
Mother officer then noticed that the detainee was not breathing, CPR was initiated and he was taken to a local hospital where he was found to be brain dead.
Officials at the Furukawa hospital explained to reporters the procedures taken to save the life of the donor and, after he died, how he was confirmed to be brain dead.
You have to be brain dead to sit in an Imax theatre and not say, "Holy cow, this is a hell-of-a-lot better.
After 25 years of chasing stories on crime and punishment, and turning over dozens of rocks to meet some real lowlifes in this town, you'd have to be brain dead not to form some pretty heavy biases on what's broken and needs some fixing.