The original meaning of "Cowboy Up" was to inform the next bullrider or bucking bronco rider at a rodeo to get ready to ride or "cowboy up". Now it means to stop being a pussy liberal snowflake with your safe spaces and whiny bullshit, grow up and be a man for once in your pathetic life.
Liberal snowflake type: Oh no! Trump won the election! I need to find a safe space to calm down and stop crying.

Real man type: No you need to stop being a pussy and cowboy up!
by NOMmnom March 8, 2017
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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 man's gotta do what a man's gotta do
cowboy up and fight hell!
by steve k... May 25, 2007
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( an insult used between men only: to metaphorically 'grow an extra pair of balls' ans take ones responsibilities like a grown man
Incompetent teen son: dad I got my girlfriend pregnant. What do I do?

Father: cowboy up and be a dad. And btw, I am busy ( slams door in son's face)
by Sexydimma May 28, 2017
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( an insult used between men only): to metaphorically speaking ' grow an extra pair of balls' and take one's responsibility like a grown man
Teenage son: dad I got my girlfriend pregnant, what do I do?

Father: cowboy up Peter. And by the way I am busy ( slams door in son's face)
by Sexydimma May 27, 2017
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Bruce Lee: Cowboy up motherfucker!
Jose Contreras: I'm halfway to Heavington, but get me a Jim
Bruce Lee: No, get it yourself
by benny b from the bronx August 17, 2007
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The "word of the momoent" for all the hilljacks and cowboy wannabes out there.
145-pound 5'11" Cletus, with Skoal in his lip and t-shirt sleeves rolled up, thumb in the front of his pants says ""c'mon ya'll....cowboy up! let's head on down to the country bar and pick us up some fat hefers!"
by Steve C. January 27, 2004
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