1. A relationship in which the man or woman doesn't deserve that person.
2. Someone who's easily forgettable; you don't remember their name but you remember their face.
1. Man, Michelle's boyfriend, Johnathon, is such a pug butt!!
2. You: What was the name of the werewolf in Twlight?
Them: Umm, idk but he's a total pug butt!!!