stiz Share definition Flag 1. noun. stimulants, esp. adderall or ritalin 2. verb. to ingest or insufflate stimulants We blew a mountain of stiz last night. It was why I pissed in Emmy-award winning actor Mitchell Anthony Pileggi's room. stiz by kike g jones October 25, 2006 0 0 Get merch Get the stiz mug. Buy Now — $32.95 See more merch