When you don't give a damn bout where you are or who your with or what your up against - your focused on whatever it is, whether you wana Knock someones ass out or your pissed off!!

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.