1. One who mongs dongs.
2. A person who is known to be an annoyance to a particular group of friends, who secretly dislike said person.
3. Less used insult similiar to "dick-head."
A week after you get a new item and new wardrobe another person purchases the same item, which; could be a variation of the original item, or the exact replica. The person who is unoriginal would also be known as, a dingbonger.