By day, he goes by rob,
By night, he goes by bobertchode
Rob and his almighty chode run the streets of gurteen and Ballaghaderreen! You best hide your woman when bobertchode is out because behind his quirky personality he’s a stone cold top shagger.

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.