The type of shits that come out with no internal form and that are extremely squishy, like butter that has been left out overnight. It has no structural integrity, so it slides out with ease and can be cut off with nary an inkling of effort.

Sometimes buttershits can be difficult to get completely finished with because the colon has a hard time figuring out how to thrust it out.
Oh God, I had the buttershits so bad! It was so runny that it just streamed down to the apex of both butt cheeks and dripped off from either side.
by Farmer Chadkins August 10, 2011
Get the Buttershits mug.
Someone who's fortitude is so weak they might as well be made of butter.
by D. Y. Vetz October 16, 2018
Get the Buttershit mug.