The frequently expansive, region of the body that includes the Einstein-Rosen bridge connecting the rectum to the outside of the body as well as the hyperbolic saddle surface directly adjacent to the ER bridge, that together require at least half a roll of single ply toilet paper to clean after even the smallest amount of feces has traversed the region.
Dad: How’s it going in there? You fall in?
Son: Sorry dad, I wanted to make sure I cleaned the ass-porch but now I have shit all over everything. I got some on my balls, on my fingers, a few globs on the floor and even some on the mirror. I probably need a power washer to get it all squared up.
Dad: Got it! You probably both wiped back and front too much and broke off a piece that was still McConnelling in the ERB.
An ass that look's really good to anybody else going by, but nobody actually hangs out there because it’s uncomfortable.
My wife has a front-porch ass because I never actually get to use it.