Woo Zi Mu Share definition Flag A woo zi mu is a bowl of opium mixed with cocaine. Comes from Woobanger (weed and coke) and Wu Zi Mu from Grand Theft Auto: San Andreas. Refers to the Chinese Opium Trade. Hey sprinkle some yay on that opium bowl and lets smoke a Woo zi mu Woo Zi Mu by TrappeJesus May 5, 2010 Get the Woo Zi Mu mug.