BLOW ONE'S MIND

{v. phr.}, {slang}, {informal}; {originally from the drug culture} 1. To become wildly enthusiastic over something as if understanding it for the first time in an entirely new light. * /Read Lyall Watson's book "Supernature", it will simply blow your mind!/ 2. To lose one's ability to function, as if due to an overdose of drugs, * /Joe is entirely incoherent - he seems to have blown his mind./ Contrast: BLOW ONE'S COOL.