Directed by Lloyd Kaufman and Michael Herz
Written by Michael Herz, Lloyd Kaufman, Georgia Harrell, Stuart Strutin and Mark Torgl
IMDB

5 members of Camp Big Tee-Pee go missing when they wander off from a nature hike to smoke a joint in a cave. The cave's opening becomes blocked and they spend the time entertaining each other with stories of losing their virginity.
This might be my favorite 80s camp movie. The cartoonish crude humor is a staple of Troma and this movie definitely is filled with it. Some of the acting isn't great, but most of it is passable. There are lots of cheap laughs and lots of nudity.

8/10