Eating Raoul
This is a classic (duh!) and if you love campy little murder plots then this is definitely the one for you. The comedy aspects in this are truly hilarious ("I'll pay a little cash for some gash as long as it's class" is an all timer) and the acting is outstanding. Paul Bartel and Mary Woronov were the perfect fit for this, but I may be a bit biased because I love when directors also act in their movies. However, Robert Beltran ate everyone up in this and it's not even close. I'd loosely (and very lowkey) call this one of those "perfect movies," especially for what it is (this sounds like an insult or a backhanded compliment; I promise that wasn't my intention).