1UP 

1.-
1UP - "Player one's score"
2UP - "Player two's score"
...

Maybe it comes from "Player one is up at the machine"

2.-
An extra life

In PAC-MAN, 1UP is shown before you score

1UP by nocker September 15, 2007

1UP 

1UP, short for One United Power, is one of the most known graffiti gangs in the history. They started of in Germany but is now international. They are most famous for they "wholecars" and "wholetrains" which is when they cover a whole tram/train with graffiti.

Dude look at that 1UP train!

1UP by ChameLeonTV October 15, 2019

1UP 

A Graffiti Group Operating mainly from Berlin, a city in Germany, 1UP is most famous for their Train Bombs. Walking through Berlin you most certainly will see one of their artworks.

I‘m in a Graffiti Group called 1UP

1UP by Cpt. P-Flipper October 4, 2023

1up 

1. (v) when somebody just tries to over power things you say to rule the conversation, or plainly, the motherfuckin world so theyre just hella cooler than your ass for some stupid ass reason..

2. (n) the knock who wont stop thinkin theyre the shit.

1. (v) Joe Shmoe: Man, look at my fucking RAZR, its silver!
John Doe: I have a RAZR, too. But hey! Mine is gold!
Frank: John, quit trying to 1up. You can't rule the world, dumbass.

2. Jane Doe: My outfit shits on your outfit. All of my outfits stay shittin on everybody outfit right quick. Look at me, model status tho. Deeeamn, who's that celebrity. Oh, me!
Diana: Jane, shut the fuck up you 1up.

1up by 1UPYOURFACE. January 2, 2009

1up 

When a person is really, REALLY toasted.

"Dude, I am sooooo 1up right now."

1up by Mada December 2, 2004

1up 

To beat or be greater than someone or thing

"Man Nicki really gonna 1up Tory".

1up by Yuri John March 5, 2017

1up 

When a guy is able to ejaculate at least 2 times in the same sex session.

Thanks for the 1up! I can't believe my baby gave me a 1up tonight. Dang bro she gave me a 1up last night..Did you 1up?

1up by CoolBeansGirl June 6, 2021