A worthless waste of oxygen who wastes everyone’s time and energy. He is nothing but a burden to everyone around him. He contaminants the dirt he walks on. The true definition of human filth.

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.