get one's brains fried {v. phr.}, {slang}, {also used colloquially} 1. To sit in the sun and sunbathe for an excessive length of time. * /Newcomers to Hawaii should be warned not to sit in the sun too long - they'll get their brains fried./ 2. To get high on drugs. * /He can't make a coherent sentence anymore - he's got his brains fried./