ib4
An acronym meaning "In before...". Usually following some type of noun. Used on forums to state that someone is posting in the thread before something imminent.
Bob: God doesn't exist!
Joe: ib4 uber-religous christians
Joe: ib4 uber-religous christians
ib4
ib4 means in before
Which you can also read about here: urbandictionary.com/define.php?term=in%20before
Which you can also read about here: urbandictionary.com/define.php?term=in%20before
ib4 they lock up the rooms then lets get out!