A type of rock music that is used as background mood music for taking lsd and most of the songs were written by musicians who were on it at the time and promotes the taking of lsd and was the favorite music of the 1960's hippie generation and also of the neohippie movement and of dark hippies.
In the 1970's and 1980's, what older people used to call heavy metal and hard rock. Now most of those people are dead, but sometimes you'll hear someone say it at the retirement home.
Junior, cut your sideburns and stop listening to that Acid Rock or you'll start worshipping Satan!
May I have an order of regular degular buttermilk pancakes? Without all the added jazz? Hold the blueberry smiley face, strawberry glaze, chocolate chips and whipped cream.