gallaghering - the act of mincing around a mock stage, hands behind the back, chin in the air, and a look of "I've just imbibed a g of coke and you lot wanna be me"

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.