Someone who has hair shaped like Justin Bieber's hair or a bowl cut.
Stuart: OMG , look at owen!
Callum: OMG , He has Bieber Hair!
Stuart: hahaha.
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Blonde or light brown , straight and swoopy
it is a phrase or saying or a type of style of hair
Dude you have "justin bieber hair" ; You know the kid with "justin bieber hair"?
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Shitting on a partners head then using as shampoo.
Damn u better stfu or Bieber girl hair is in your future