Dirty fucking butt-sex, often not consensual, usually resulting in much more dampness then the name implies. Also, as an adjective, it is the actual asshole-to-colon trail a big cock takes when butt-fucking someone.

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.