Blotter Acid Share definition Flag Street name for LSD. Mainly used in the Hicks side of society when they have nothing better to do other than trip on their own feet. "You have to have taken 4 hits of Blotter Acid to mistake the moon for a cloud." Blotter Acid by Namegiven June 18, 2014 0 0 Get merch Get the Blotter Acid mug. Buy Now — $32.95 See more merch