One who hoards the entire sack, not just one testicle or just the scrotam.
To be considered this, you must hoard sack on a regular basis, for selfish reasons only.

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.

One who hoards sacks; the act of accumulating as much sack as one can take