Swamp Thing (1982)
A campy Wes Craven movie based on a comic book character. It's retarded, pretty much every one in two lines is ridiculously dumb and there's stupid shit going on all the time. It'd probably make perfect mst3k fodder, or at least be great to watch in a group.
What brings it above the average mst3k flick are the decent direction and action. Adrienne Barbeau does an OK job as the main gal, and there's a gratuitous boobies scene so that's great. Basically, this movie is a good way to waste 90 minutes.
2/4PS the wolfmonkey the bad guy turns into in the end kicks ass