The act of biting a females neck / back while hitting it from the doggy style position, such that a permanent bite mark will be left for the next person to hit it from the back to see.

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.