"buy" is the dance you do while you download music off the internet.(usually in an illegal fashion.)
by Michigan Man March 11, 2009

"Hey, check out my new Brita water filter. Go ahead have some water - it tastes so good."
"You're so Bui."
"Hey, you wanna go out to eat?"
"No, I'm gonna stay here and study for my exam?"
"When's your exam?"
"In 3 weeks."
"You're so Bui."
"You're so Bui."
"Hey, you wanna go out to eat?"
"No, I'm gonna stay here and study for my exam?"
"When's your exam?"
"In 3 weeks."
"You're so Bui."
by Brett Hendar March 7, 2009

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

by Elementop August 5, 2007

by Jus1rj November 15, 2019

1. Blogging under the influence of alcohol or drugs.
2. Barfing under the influence of alcohol or drugs
2. Barfing under the influence of alcohol or drugs
1. I was BUI last night. I woke up this morning and realized that what none of what I wrote made any sense...
2. Each time I have tequila, I wind up BUI.
2. Each time I have tequila, I wind up BUI.
by Spunky Union May 18, 2007
