Y'golonac is a horrible entity trapped behind a brick wall under the earth, destined to once more roam the world, killing, raping, and doing whatever it pleases once more. The fufiller of all desires. The Violator. The Defiler. Anyone who reads it name or hears it aloud is subject to possession by it. Yep, you're pretty fucked.

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.