noun. the substance commonly called Ketamine used in Anaesthesia of animals and small children. in the party world its called special K but Its also called Nyborg because of how it makes you feel, it is actually a reference to the film Heavy Metal.
by Rhigd November 24, 2013
plutonian nyborg is a fictional drug seen in the classic 1981 animated feature film "Heavy Metal". the drug is an inhaled white powder whose appearance resembles cocaine, and whose effects resemble those of marijuana; used by two alien starship pilots Edsel and Zeke, seen in the segment of Heavy Metal entitled "So Beautiful and So Dangerous".
by jeffman52001 October 14, 2013