When a person shoves any kind of string, regardless of thickness, through the crack of another and then pulls it out without any kind of warning.

This is also applicable to vaginas when done to a woman.

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.