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1.
itty bitty titty society
that girl looks like she belongs to the IBTS
by 53x August 15, 2006
47 8
 
2.
IBT
It stands for Itty Bitty Titty
Danggg! That girl's front is as flat as her back! Put a sign that says IBT on her!
by Hi Mom April 20, 2006
42 21
 
3.
Itty Bitty Titties
guy 1: dude did you see that chick?
guy 2: yea she had sum IBT's
by Palotolker August 19, 2008
4 0
 
4.
Acronym - In Before The Spam
Generally posted on a forum after an announcement by somebody important and/or concerning something important, where everyone generally replies quickly with stupid shit.

Works similarly to IBTL.
Administrator: This is a very important announcement about this website/game/forum.
Person 1: IBTS!
Persons 2, 3 etc: OMG WTF STFU NO WAI
by electrocutioner3000 July 12, 2006
6 5