1. To show up unannounced after it has been established that you are not invited over.
2. To be a bad sport; to get pissed when one loses
3. To blame the "computer" and other instances of "cheating" when one loses particularly in close competitive situations
A Dutch word which when used in a conversation, means a person "from the mountain"... as opposed to a VandenBURG...which is just some guy from a town.
As a last name it means "shit hot"