A person who tries to latch on to other peoples success; a person who tries to attach themselves to people gaining success.
Josh acts like he knows Megan because she wrote a book, Josh is such a glamor hound.
Another word for a person you are dating on the side, your side piece. They are not the main course, they are your bread stick, maybe they are better than the main course your significant other or maybe they are just what you need before you start the meal.
I'm going to see my breadstick this weekend, while Riley is at that business conference in Boston.