planet fitness pants are the skin tight, almost see through latex pants worn by overweight women that work out at planet fitness. these women of course have no business wearing anything that revealing/tight in public but because they're working out (or just came for the free pizza) they feel the urge to show off their flabby, cottage cheese bodies like they are supermodels

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.