The act of releasing smelly flatulence in bed and under sheets while another person is getting ready for bed, so that when the other person pulls down the covers and crawls into bed that person is struck in the face by a noxious odor.

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.