I Was a Teenage Zombie (1987)

Before the zombie craze hit the world there was the horror comedy I Was a Teenage Zombie (1987). When six friends accidentally kill a drug dealer, they unknowingly dump his body in a pond of toxic water. When he returns as a zombie and starts killing people, the friends hatch a plan to take a recently deceased friend, put him in the toxic pond and create a “good” zombie to battle the undead drug dealer.

You’re shaft will rise from the dead when you check out Lynnea Benson in her bikini. She walks into camp, showing off her tight body in her skimpy swimsuit then talks her man into going swimming.