When, seconds after finishing a shower, a big dirty poop begins slamming around in your intestines. After jettisoning the egregious turd and wiping, you still feel unclean, so you are forced to return to the shower and soap up the inside of your butt crack again, after having just done so minutes earlier.

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.