blow one's mind, to

blow one's mind

1. Surprise, shock, or amaze one, as in This jazz group blows my mind, or Joe served a jail sentence? That blows my mind. This term is used rather loosely, as seen in the examples; the first signifies amazement and pleasure, the second shock and dismay. [Slang; 1960s]
2. Alter one's perceptions, especially through drug use, as in Taking LSD really blows one's mind. [Slang; 1960s]
3. Make insane, drive crazy, as in Was it his wife's death that blew his mind? or Losing her savings blew her mind. [1960s]
See also: blow, mind

blow one's mind, to

To shock or surprise or astonish one; also, to lose one’s mind, to go crazy. This slangy phrase dates from the mid-1960s, when hippie culture and anti-establishment feelings were at their height, and when it also meant to have a drug-induced experience. By 2000 the most common usage involved amazement, as in “He managed to juggle eight oranges at a time—it blew my mind.” See also blow away.
See also: blow