Zygote Rifle Share definition Flag Of or pretaining to the penis or dick, revolving when the penis ejaculates fireing seemen (zygotes) onto the "action field." Man, I unloaded my Zygote Rifle on Kristi last night. Zygote Rifle by Prosser August 28, 2007 0 0 Get merch Get the Zygote Rifle mug. Buy Now — $32.95 See more merch