The legendary cross breed you get when a donkey and a goat have had a few beers and decide to shag
AKA a satanic offering to the world that brings about the destruction of mankind with its enormous Penis

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.