How to remove yourself from multiple groups on Facebook?

[Mohammad [Spurs/Bears/Tigers]]

I've joined a lot groups, and I think they are just annoying now. I want to get rid of multiple ones, and I'm having trouble trying to do it with groups. I've figured it out with pages, but I can't figure out a way groups. Usually I can figure this stuff out, but I can't figure it out with groups.

Thanks!
Noah, I considered doing that but having about 50 groups I'd want to delete, it'd take way to much time.