Nicholas "Nick" Cvjetkovich (born August 29, 1973) is a Canadian professional wrestler, television actor, comic book artist and tattoo artist. Cvjetkovich is best known for his short time with World Wrestling Entertainment (WWE) where he wrestled on their "SmackDown" brand under the ring name Kizarny. Cvjetkovich has also worked for Total Nonstop Action Wrestling (TNA) under the ring name Sinn. He currently competes on the independent circuit.