William Zabka as Johnny Lawrence in The Karate Kid

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Johnny Lawrence, The Karate Kid
Any character known for his blond hair, blue eyes, black belt and ubiquitous headband is not likely to give you the warm fuzzies. Sure, some may think Johnny was misunderstood, but fighting dirty is hard to forgive. When this archetypal '80s bully swept Daniel's leg, he secured a spot in the dirtbag hall of shame.