shit shredding
When someone needs to take a shit and instead of shitting he continously farts his shit. Very common during a long road trip.
During our long drive to the beach Martha kept shit shredding instead of asking to stop at a restroom.
shredded shit
When your turds look like shredded wheat coming out. Usually when you eat lots of fiber.
Wow, I just took a nice shredded shit! I swear that the All Bran is cleaning me out!