n. Combination of LSD and PCP. Not too pretty combination from an external view.
Keila took a hit of black acid and rested on the couch. She started freaking out the next hour, asking for milk and ripping out the cushions that were "talking to her".
by Smkngmgc June 20, 2004
Contrary to popular belief, black acid is not an acid/pcp combo, but a type of very, very dirty LSD crystal. The crystal is black, hence the name. The "family" name for this crystal is champagne. Really nasty stuff. The reason for this myth is that the effects of all the impurities alter the trip so much that it's almost like PCP.
You have any of that black acid man? Nastiest shit ever!
by mike August 01, 2004