Definition from Wiktionary, the free dictionary
- A wild party where the drug acid is taken.
- 2002, Steve Puchalski, Slimetime: A Guide to Sleazy, Mindless Movies - Page 138, "TONIGHT YOU ARE INVITED TO A ‘PILL PARTY' You will experience every jolt...every jar of a Psychedelic Circus....The Beatniks...Sicknicks...and Acid Heads...and you will witness their exstacies, their agonies and their bizarre activities...You will be hurled into their debauched dreams and frenzied fantasies! For the adult minded...LSD! DOPE! HORSE! The revealing story of today's HALLUCINATION GENERATION"