When you attempt to have sleep sex with your girlfriend but was unaware she was loaded on constipation meds all day and ended up in a shitty situation.

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.