Slang for taking a huge shit in any public place; inside or out.
EX 1- "Hang on guys, I'm gonna go cowboy up real quick."

EX 2- "Damn I need to cowboy up!"
by Juxtet August 4, 2006
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"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 October 11, 2003
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Basically, another way of saying "Shut up and take it like a man" or "Quit your whining." The term is derived from the popular image of cowboys being tough, unflinching, uncomplaining, and hard-working.
"Cowboy up, man. What would John Wayne say if he heard you complaining over a little hard work?"
by You Can't Kill the Metal October 7, 2006
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Another incredibly vacuous term that no longer has the same meaning it initially did, thanks to cultural theft and abuse by people who aren't really cowboys at all, but bored, middle-class white people. It used to mean to toughen up or approach a problem with a hard attitude, but now is used to refer to anything requiring effort, or anything in which people are competeing against each other.

People sport the logo on their clothing or their car because they think it gives them credibility as a cowboy or a redneck, since it is now cool to be associated with these groups once again. But when you get down to brass tacks, most fans of the cowboy up marketing scheme are those who have no connection with the cowboy way of life at all. See poser, git er done and white trash.
Jenny thought that putting her "cowboy up" sticker on her SUV would make others think she was a country girl. In reality, most people just laughed at her.
by Eric in NE March 2, 2006
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A term used by small city fire departments when a Big City Fire Fighter takes initiative to accomplish a task during an emergency without being told to do so.
Did you see the Big City Fire Engineer "Cowboy up" when he took lights and blowers to the front door of that structure fire? I.C. never requested that.
by Johnny Wayne October 5, 2013
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Used in the same sense as the expression "get yourself together." Often heard with an expletive.
"Cowboy the f*** up!"
by Sage November 16, 2004
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What your fat hillbilly neighbor says when he's ready to get going.
You: We ready to go mow some lawns now?
RJ (typical hillbilly name): YEAH BOY, LETS GO BABY, Cowboy Up!!!!!!
You: Ok then...
by Lord_Ahrim1536 June 26, 2015
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