Person A: "I just got a 93% on my history test!"
Person B: "I got a 98%."
Person A: "Ok, you one-upped me there."
Person B: "I got a 98%."
Person A: "Ok, you one-upped me there."
by Prox March 19, 2005

Exaggeration of completely made of story of one person to get attention or steal the others thunder. Usually done by a competitive person
by nbunch81 June 13, 2016

When one person talks about their accomplishment, another person in their discussion chimes in about how they have either already done that or how they have done something else. Common among friend groups, and acquaintances.
by SummerBoi?! December 23, 2017

Eg1
Guy: I just shot down the enemy chopper!
One-up: Yeah, I did that with my tomahawk like five times.
Eg2
Guy: I just got my first nuke!
One-up: Yeah, after my first nuke, I got one every round after that for three days straight
Guy: I just shot down the enemy chopper!
One-up: Yeah, I did that with my tomahawk like five times.
Eg2
Guy: I just got my first nuke!
One-up: Yeah, after my first nuke, I got one every round after that for three days straight
by Yodaguy January 16, 2011

It seemed the other team was always One-Up on us.
Despite her efforts, Sally felt Jane was always One-Up on her in responses.
Despite her efforts, Sally felt Jane was always One-Up on her in responses.
by ra78 September 30, 2009

To exceed expectations.
To do better than someone at something ( the person is generally good at the said task).
To do better than someone at something ( the person is generally good at the said task).
by Arcane15 September 22, 2014
