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1. Cowboy Up!
"Cowboy Up" is when you are injured or down and the prospect of doing whatever it is you're about to try is so bleak that the best you can hope for is to live through it.
This year, the Boston Red Sox cowboyed up to rally against the Yankees in the championship series.
by Jeff Newell Oct 10, 2003 add a video
2. Cowboy Up!
An incomplete phrase from Broke Back Mountain meaning "cowboy up your ass".

Oh my god theres a cowboy up! my ass!
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