Yicki Share definition Flag Pronunciation: (YEE-KEY)A synonym for a Sidearm or Firearm. One of the used slang in the terminology of gangs in Sacramento. 1. "Yo pass me a klip, blood. Ma yicki done ran out."2. "AYE! NIGGA GOT A YICKI ON HIM... RUN NIGGA!!!" Yicki by SOBXRBE August 11, 2017 0 0 Get merch