a day in which a person (most often a teenage girl) wears sweatpants, with her hair up, and no make up. these days are most common after a late night, a break up, or paired with a hangover.
it is best to not mess with a girl on these days, she will attack.

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.