beat brains

beat (one's) brains (out)

Informal To exert or expend great mental effort: She beat her brains out during the examination.
See also: beat, brain
References in periodicals archive ?
Kennedy once said about Bundy, "You can't beat brains," but as Goldstein demonstrates, Bundy was so cerebral he was insensitive to the plight of others, his moral compass so awry at times that it provided no legitimate bearing on which to base policy.
How can this be achieved when the beat brains are taken out of poor countries?