Noun: usually a young man who spends way too much time snuggling his mom in public, has a haircut that covers most of his forehead and does too many things alone in his bedroom (either playing video games or masturbating or some combination of both activities). Possibly over weight and or has red hair.

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.