A military slang term that describes when two personnel are posted at a lookout or guard situation. One unit stays alert and awake watching for movement/activity (one up) while the other takes a nap or rests (one down). They alternate so as to be able to extend their alertness for a longer time. It is an unwritten rule that you must wake the resting person if you start to become tired yourself as the "One Up".
"We had 12 hours stuck on that LP/OP behind enemy lines so Smith and I decided to go One Up, One Down. I took Up first."
by Americ4nBulldog September 18, 2015
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The same as rubbing one out which is simply masturbation. However, Rubbing On Up is exclusive to male masturbation and accentuates the process vs. the end result.
Justin is a constantly watching porn and finds his hands busy Rubbing One Up.
by Eaton Holgoode July 3, 2009
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1. (n) An individual who, in any given conversation, will not hesitate to barge in with an anecdote of often questionable eligibility that in some way makes him better than anything you've said so far in the conversation

2. (v) To commit the act described in being a One-up James
Becky: So I adopted a kitten from the SPCA the other day, he's SO cute!

One-up James: Funny you should mention that, Becky, I just adopted Five kittens that I saved from a burning skyscraper last weekend

Becky: But aren't you allergic to cats?

OUJ: Oh, I was, then I developed the cure for anything
by 7thAge May 1, 2011
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Yo- Imp why don't you spin one up ya know?
That stupid hippe should spin one up eh?
by gumbolis March 1, 2008
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Johnny is one of a select group of people who think they contain a vast well of knowledge on all subjects. Like Cliff Clavin the character on the old TV show Cheers, he pretends to know intimate details about everything—from the best region for the manufacture of shoe polish to the calibration of gene splicing equipment. Johnny works as an hourly employee in a large corporation and has no specific higher education or degree.
Greg: "I have a stomach ache."

One up Johnny: "That pain in your abdomen could be from a variety of internal organs. These organs include the stomach, small intestine, colon, liver, gallbladder, and pancreas. It could be a serious condition. You should consider being evaluated by a physician"

Greg: "Yeah, or it could be from that donut I ate earlier."

Mike: "Have I ever told you I have a motorcycle?"
by Reverent JAB September 20, 2009
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to shit oneself pooless in a curly fashion
I'm off to lay some Stereophonics Drummer type shit.
by Judster October 15, 2004
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A game, the object of the game is to figure out how to play.

you have 3 choices: 2 up, 1 up 1 down, or 2 down. what you are is dependent on your hands/arms for instance if you have both your hands in the air then you are 2 up

the point of the game once you figure out how to play it is to play with other people and change what you are as nonchalantly as possible
John: Want to play One Up, One Down?
Bob: Wtf is that?
John: c'mon just play
by The Jolly Ginger Giant July 24, 2010
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