Shit X-fer Share definition Flag The two person act of moving shit directly from ass to mouth. A secure, air tight lips to anus seal is recommended for best results. Tony gave Chris a nice and meaty shit x-fer. Shit X-fer by J.A.P. December 10, 2007 0 0 Get merch Get the Shit X-fer mug. Buy Now — $32.95 See more merch