Practically unacknowledged existence of highly porky smelling oil secreted around the anus - avoid showering for a few days to discover this. Can be smeared under the nose of a fellow camping / dormitory occupant as a punishment.

Other 'oils' exist - discover and enjoy......
Lamb oil - found in the pubes,
Cheese oil - found between toes esp. athletes foot
Bacon & onion oil - armpits
Chicken oil - hair!
Prawn oil - earns, esp if infected.

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.