Used to describe an idea or way of thinking that is neither sensible or logical. A combination of scat and logical.
"If she thinks she is going to get him to marry her, she's being scatalogical."
by bowlegs February 26, 2007
An encyclopedic volume encompassing the various species of rectal excreta.
Jason: "I woke up this morning with a terrible case of the plops. For the life of me, I just can't remember what I ate last night."

Dean: "Sounds like it's time to break out a scatalog and look it up."
by terminal2 October 27, 2009
The way you can say "Same Shit: Different Day" to family, friends, boss, co-workers, priests, cops, Oprah Winfrey, Sarah Palin etc and sound highly literate.

It even has the same acronym (SSDD).
Scholar 1: "How goes the research into Shakespeare's use of Jungian allegory in his tragedies?"

Scholar 2: "Scatalogically Similar: Diurnal Discrepancy."

Scholar 3: "Ah yes, indeed." (Cluemeter reading zero)
by Uncle Des September 4, 2010