Frankenshit
A single lump of feces comprised of two or more meals, and each meal segment can be clearly defined within the log (whether by sight or smell).
I went backpacking through Europe and tried so many different foods in one week that I had Frankenshit dumps until I got home.
Frankenshit
When your partner shits into your asshole and it mixes with your own shit before you shit the whole thing back out.
"Me and Jenny made a Frankenshit last night (;"
"Oh god, she pooped into your asshole again?"
"Oh god, she pooped into your asshole again?"