One-upmanship

Is the art or practice of successively outdoing a competitor, rival or enemy/friend.
X: aww i like kati
y: ohhh yeaahh...you doo do yaa (he (y) doesn't like her but just wants to ruin the chances of them getting together, so behind (x's) back gets her (Kati) to go out with him, X is annoyed about them getting together but pretends its not bothering him, meanwhile X is using the same M.O 'method of operating' to get one back.

The one-upmanship escalates until either one stops, or they realise there both at it..(which would quite amsuing for them, or embarrasing.. depends how you take it ;)
by LJcalvert May 09, 2010
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One-Upmanship

Expression to describe the dedication shown by someone who is amazingly sentimental with their passion to "one,-up" an opponent, who may or may not actually be concerned with the ability of the former.
"Yo, I tried to get a handful of them zoom-zooms, but several trust fund bitches were all about that one-upmanship, offering over cost for a bulk amount that should receive bulk rates.."
by UpallNite December 12, 2021
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