Made up on twitter, it is a type of orgasm people get when they see teen popstar sensation Justin Bieber. Justin may even get these himself time to time.
Justin Bieber Fan #1: OMG! Justin looks sooo hot here!! :0

Justin Bieber Fan #2: It looks like he's having a biebergasm! mmmm.
von Belieber 20. Dezember 2009
when every girl at a justin bieber concert simultainiusly have an orgasm when he starts singing
Dude: did you see the biebergasm last night?
Guy: ya i got a major stiffer
Dude: i think justin had one himself
von bootyfreak 21. Januar 2010
A sexual erousment you get when you see or hear teen pop sensation " Justin Bieber "
Bieber Fan No.1 : oh my god he's so hot!
Bieber Fan No.2 : oh i know, i hink i just had a biebergasm!
von JBFanClubX 10. Januar 2010
When Justin Bieber does something that makes you horny
biebergasm!
von BelieberJam 12. November 2010
When someone has an orgasm, after seeing or hearing Justin Bieber and redefines it as "Biebergasm"
OMG. Justin Bieber is soooo hot! BIEBERGASM!
von iluvbieber 2. Juli 2010
when you see justin bieber, he is SO hot and you are so overwhelmed you have some kind of an orgasm, except its completely justin bieber-ish. :)
girl: ..and this pic is of paris hilton
other girl: cool
girl: and this is of..OMG, justin bieber!
other girl: omg omg omg hes so hot, *sighh*
girl: i TOTALLY just had a biebergasm
other girl: same. here.
von RoRogirrrllllyyyyyyyy yes. 28. Oktober 2010
when a belieber (justin bieber fan) Gets REALLY REALLY excited
von bieberfever247 3. Dezember 2011

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