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- (slang) Enthusiasm for the Canadian singer Justin Bieber.
- 2010, Ree Hines, Tabloid Tidbits:
- The last time she cozied up for a photograph alongside teen-dream Justin Bieber, Kim Kardashian learned just how serious Biebermania could get when she received a rash of death threats.
- 2010, Sarah Parvis, Justin Bieber, page 65:
- Biebermania doesn't always result in injury, though. The outpouring of devotion from his fans comes in other ways, too.