The term 'GHOSTBUSTERS GOOPS' is a reference to the popular 1984 movie 'Ghostbusters'. The term is an acronym for 'General Homicide, Occult, and Paranormal Studies and Tactics Emergency Response Squad'. The crossword solution for this term is 'SLIMES', which stands for 'Specialized Limbic Interdimensional Mobile Extraction Squad'. This squad is a specialized team of Ghostbusters who are trained to capture ghosts and other paranormal entities.