Mine is Drop Dead Fred. (Which I did not realize until just now also featured a young Ashley Peldon.) Gene Siskel said it was one of the worst movies he’d ever seen! Leonard Maltin called it “a putrid mess”! It’s allegedly now a cult fave but I find that hard to believe! The late Rik Mayall, who plays the titular character, has a truly chaotic Personal Life section on his Wikipedia! I will never forget sitting there in the movie theatre and thinking, “wow, this is NOT good.” We did not leave, however, because it was extremely hot that day and I was a high school student on summer vacation and had nothing else better to do.
Your turn!