Twice Upon a Time! It's from the early 80s and it's a cut-out animation movie. It's about two workers at a dream factory who get fired for being terrible at their job. It's. much better than I'm making it sound, I promise. It's my favorite movie ever, but it's pretty hard to find nowadays. There's two versions, one "edited" version which was cut down for broadcasts (and was shown on Cartoon Network a few times, I believe) and then the "uncut" version, which is mostly the same but with the raunchier jokes intact and a few swears left in the dialogue. I imagine the latter might be more common online, but the former is what the official VHS release was, I think. It was never released on DVD because the directors had a falling out and that's also why it's difficult to find anything hahaha OOPS.

tl;dr Twice Upon a Time is really good but also really hard to find for reasons.