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
itty bitty titty society
that girl looks like she belongs to the IBTS
by 53x August 15, 2006
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
Itty Bitty Titties
guy 1: dude did you see that chick?
guy 2: yea she had sum IBT's
by Palotolker August 19, 2008

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