Wired:

Mystery Science Theater 3000 (is) the cult-­stoking comedy series that provided awful films with hilarious, sharp, high-speed detractors’ commentary. MST3K is the story of a sarcastic Earth dweller—played initially by series creator Joel Hodgson and, in later years, by head writer Mike Nelson—who’s exiled to a ramshackle spaceship called the Satellite of Love, where he’s forced to watch an endless supply of crapola movies. Our hero’s response to such torture, naturally, is to unleash a torrent of withering one-­liners, or “riffs,” that he delivers with the help of a couple of robot pals.

I never actually saw the show but have heard many geeks and nerds refer to it lovingly.