a socially adept yet shallow and superficial person whose main claim to faim is boorish behavior and a proclivity to appear in amateur sex videos

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.