The term THE BIG BANG THEORY SORT is a crossword puzzle solution that consists of four letters: GEEK. The Big Bang Theory is an American sitcom that aired from 2007 to 2019. It follows the lives of four socially awkward scientists and their friends as they navigate life in Pasadena, California. The show was popular for its geeky humor and references to science and technology. GEEK is an appropriate solution for this crossword puzzle, as it accurately describes the characters in the show.