Heathers (1989)

If Heathers taught us anything, it's how to rock shoulder pads and plot revenge in one breath. Forget your average high school drama; this is the league of croquet and scrunchies turned lethal. It’s like every time you mention 'Greatest High School Movies of the 80s,' someone pops up with a Heathers quote and a twisted grin. Seriously, try discussing high school movies without stumbling into a Heathers cult meeting—it’s a dark, hilarious maze no 80s aficionado can escape from!