When two people willingly participate in a fist fight, be they friends or enemies. A third person counts to thirty (30), hence the name, and after that time the fight is over. The counter or other bystanders judge who the "winner" was (usually who got the most hits).

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.