by LisAnne Becotte` June 23, 2005

To challenge someone by getting in their face and disrespecting them with belligerent comments or trying to stare the them down.
I was laughing at this guy behind this one dude and the dude thought I was laughing at him so this nigga had the nerve to BUCK UP to me and I had to lay his ass down.
by Joshiro007 February 12, 2003

by grimkey July 13, 2006

Jake examines Mike's life, Mike's cars and Mike's houses in various locals. Jake turns to Richard and says, "Mike is Bucks Up, bruh."
by fur burglar April 6, 2010

When 1 male co-worker decides to have sexual intercourse with another male co-worker for personal gain, or, when 1 male co-worker offers up homoerotic sex to another male co-worker to payoff a debt.
After years of working together Tom realized the only way he was going to be invited to the party was if he started bucking up with Jim.
by Unknow-69-69 July 27, 2016

Johhny: "Mom, im getting 'bucked up with my friends and then driving home."
Mom: "You're doing WHAT?!"
Johnny: "Relax mom, im just getting a trenta iced coffee with 3 espresso shots at Starbucks with my friends."
Mom: "Okay, just make sure you're home for dinner."
Mom: "You're doing WHAT?!"
Johnny: "Relax mom, im just getting a trenta iced coffee with 3 espresso shots at Starbucks with my friends."
Mom: "Okay, just make sure you're home for dinner."
by mothercocker August 20, 2011
