When you diss or insult Justin Bieber about his hair, voice, or music, just to start a hateful conversation about him.
Bailey: Justin Bieber sounds like a girl when he sings. He needs to grow up.
Sam: Stop JB dissing. He's not that bad.
Sam: Stop JB dissing. He's not that bad.
by Imma Anna Bee October 20, 2010
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JB diss
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