Originally the past tense of "to shit," but shat has evolved into
something more. Shat doesn't share the harsh connotations of "shit," nor does it share it's seriousness.
Shat can be used in multiple fashions, such as "shatty," "shatting," "shatness," and
even "shatmaster." It's uses are ambiguous, so even more
exotic fashions of use are still evolving.
Shat nub, that shatty
movie was, by far, the shattiest shat I've ever
seen. It's shatness equaled 1000 Jack Thompson's in a
single room. I fucking hate that shatting shatmaster.