Two of my favorite 1980's films which nobody has mentioned yet:
Spaceballs (don't eat or drink anything while watching, you might choke to death)
Batman: Nicholson and Keaton version (the absolute BEST Batman movie that will never be topped in my opinion)
And, if you're looking for a "chick flick", Pretty Woman. yes, I know that film came out in 1990, but it was the only thing I could think of.