The act of shitting into a cup, eating it und then vomitting onto the boys dick. After this is done she starts begging for his cum.
She is an innocent little girl, probably with eating problems. Bit deep inside she wants to be a slut

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.