Top definition
Acronym meaning super justin bieber obsession
Or sexy justin bieber obsession

Its a disease when a girl has an irrational crush and obsession over pre-teen singing sensation Justin Bieber. Most common in girls aged 8-18. is on the verge of becoming a nationwide pandemic. Not to be confused with bieber fever.
John:Hey whats up with Jessie recently?

Adam:She keeps posting on facebook how she loves justin bieber, shes got SJBO.

John:dammit.
by Cipher(KTO) February 13, 2011
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