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1.
The act of voiding feces from the bowels, returing as much of the expunged feces as possible back to the bowels, and then defecating the freshly installed feces back out of the bowels. Note that the second release of feces is much more septic than the first.
I had nowhere to hide my dog's shit, so I made it fecal bifeciate the load.
by EGM September 04, 2003
 
2.
The act of defecating onto any clean surface, and then returning the feces back into the bowels. Then, the act of shitting it back out. Can be repeated as necessary.
Today, I shit in class, and had to use fecal bifeciation to hide the evidence.
by BC September 03, 2003