The dirty Marlon is when you sneak a tissue (usually unused) up your partners rectum-hole and yank it out during sex to clean it. Maybe with less shit in their up their ass they stop talking it as well.

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.