A person's step dad who in all means is a douche bag that thinks he knows what's right all the time, usually get's the last word on things, labels his sons friends, and does ass whole-ish things.

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.