10th graders who repeatably hookup with upperclassmen to move up in the social ladder
or
a general word to describe irritating and lascivious underclassmen

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.