Someone who takes pleasure in defiling a public or common restroom -- especially if it is your office/work place -- with their feces. For example they will leave butt crust on the toilet seat or not flush. They might smear their shit on the toilet lid. Or they can wipe their ass with toilet paper but throw it on the floor. It does not have to necessarily be the bathroom they terrorize. For example, they can take a dump while nobody is looking where you might accidentally step in it.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.