Mannerism used to connotate loser, idiot or better yet, "hoser" in canadian. Although a variation of "nigga", it applies to whites as well as blacks, (and azns too)
1. response: What are you doing you nogger? I told you never to turn the mixer off when the amp is still on!
a nogger is a person of colour who calls each other by hip lingo such as instead if "hey nigger" they would say "hey nogger" as it adds a comical turn on the phrase.