Itty Bitty Titties
guy 1: dude did you see that chick?
guy 2: yea she had sum IBT's
itty bitty titty society
that girl looks like she belongs to the IBTS
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!
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