noun Those addicted to the adrenaline boost of being scared
This can be shown by having an abnormal love of horror films, seeing a scary film an abnormal amount of times or going to a place / doing something you know will scare you... abnormally.

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.