the frothy condensation adhering to one's ass-crack after a long, hot fart (generally harmless and containing no particulate matter),nevertheless, leading to a trip to the facilities to perform a courtesy wipe.

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.