A term used to describe the strongly secure state of a given place or item that even black people would have problems penetrating.
Nobody will be able to break into my new house with this high end security system. My house is nigger proof!
1. The boss character in Nintendo's "The Legend of Zelda: A Link to the Past" video game, who is at the end of the Ice Cavern.
2. Screen name used by various people.
To save the maiden in the Ice Cavern, you must defeat Kholdstare first.