"Madman Marz" is a fictional character from the horror film series Madman. The character is depicted as a vengeful spirit of a murdered man who haunts a secluded campsite, seeking revenge on those who disturb his resting place. The original film, released in 1981, is known for its slasher elements and has gained a cult following over the years. The story revolves around a group of campers who encounter the terrifying presence of Madman Marz, leading to a series of suspenseful and gruesome events.