Top definition
Lazy typist's way of spelling 'before'
"U bin there b4, bro?"
"ya, wit u"
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2
Most commonly the last thing you hear before "I sunk yo battleship!"

24 hrs nonstop shop, if you forgot something or your just coming home from downtown, stop by anyone is welcome! employing the youth of tomorrow
Snowman: Man now what?
Noid: B4?
by foug June 19, 2003
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3
B4 is a vitamin supplement drink that prevents hangovers from happening before they start.
Don't forget to have a B4, we're going to get our drink on tonight!
via giphy
by beagle74 May 28, 2018
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