to give someone 'the eyebrow' is to raise ones eyebrows at the recipient then flick their gaze back and forth from the recipient towards another person in a suggestive manner.

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.

The act of raising one's eyebrows in surprise to acknowledge a girl he used to sleep with but no longer speaks to. Considered less rude than ignoring altogether and less awkward than engaging in conversation.