Mystery Science Theater 3000 ended in 1999 but both formations have continued to take the mickey out of bad movies. Cinematic Titanic consists of most of the earlier cast, they seem to stick to the more traditional riffing of trashy horror flicks and you can also go see them live. Rifftrax is made up of Mike Nelson, Bill Corbett and Kevin Murphy (the Crow and Tom Servo I'm familiar with) and besides a vast library of shorts, such as public service announcements, they also riff on more familiar movies such as Twilight and Transformers. So, always wanted to watch Twilight, but felt like you couldn't live with the embarrasment? Try downloading the Rifftrax version and play it along with the movie, guaranteed fun (and astonishment at just how bad the movie really is)!
DVD's are available from Shout! Factory and you can also download episodes to rent or buy on iTunes, Xbox Live and PSN. I'd recommend the third-rate Gremlins rip-off 'Hobgoblins' to start you off, or perhaps 'The Final Sacrifice', a cult-based 'thriller' that's guaranteed to have you cheering on the mighty beer-swilling Canuck RRRRRRRRRRROOOOOOWSDOOOOOWERRRRRRRRRRRR!!!!
Mystery Science Theater 3000: https://www.mst3k.com/
Cinematic Titanic: http://www.cinematictitanic.com/