When something's REALLY important. The tags "bold," "underline," and "italicize" begin with the letters BUI, hence the term. When someone using BBCode BUIs something, you know shit's about to go down.
by MegamanTTEX November 3, 2010
Get the BUImug. The amount of money required to buy a spot in a poker tournament. It's also generally your starting amount of money in the tournament.
by PsyMar June 26, 2004
Get the buy-inmug. by Wolfpack69 March 5, 2009
Get the Buied mug. by Joe Ernster esq. August 6, 2007
Get the buimug. "buy" is the dance you do while you download music off the internet.(usually in an illegal fashion.)
by Michigan Man March 11, 2009
Get the "buy"mug. Dude, it's payday! Come on down to the bar, it's buy-in!
I'll be there....What's buy-in?
You're buying the first round. See you there.
I'll be there....What's buy-in?
You're buying the first round. See you there.
by KillAllHumans September 16, 2004
Get the buy-inmug. 