A twisted clown who unleashes their evil by defacating on people's property, often objects with obvious sentimental value.
Max was a long time defacator but his twisted scheme came crashing down when he was caught mid loaf, unloading his payload into the cup on the the 18th green at Pebble Beach Golf Course.
Someone who ruins a relationship deliberately, they have an astounding level of patience, confidence and consistency. When someone has broke up with their partner and it's neither his or her fault, it's likely that they have been the victim of a relationship defacer.
Person 1: Why did you and Mel split up? You seemed really happy together.
Person 2: A relationship defacer came and ruined everything.
Person 1: I'm sorry.