n. abbreviation for the cult hit television series "Mystery Science Theater 3000", in which 'B' movies are made fun of by the the show's three central characters.
Started on local access by creator Joel Hodgson, later moved on to Comedy Central through season seven, then the Sci-Fi Channel until its tenth and final season.
Also included a feature film, "Mystery Science Theater 3000: The Movie" with a limited theatrical release.
"Hey, MST3K is not 'a puppet show'! It's THE puppet show!"