South Park’s Wearer of a Beanie

Puzzle 10 of Reality TV Pack

Question is: South Park’s Wearer of a Beanie

and the answer is: STANMARSH

Word Meaning:

STAN — (Internet slang, sometimes derogatory) An extremely obsessive fan of a person, group, character, or creative work, particularly one whose fixation is unhealthy or intrusive.

Definitions from Wiktionary.