The Hot Clark is when you shit your pants on the way to work, work in them all day while smearing the shit deep into the fibers of your trousers, then take them home for the wife to wash.

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.