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15.
Someone who is overstepping their boundaries or taking things too far. A synonym or tiger.
"...so there we were with a couple of Canadian lumberjacks and a one-eyed, one-armed Norwegian quadriplegic. So I turned to Umberto and Crazy Pete and said, ´How'd we end up in this Turkish prison anyway. WHAT'S GOING ON HERE?´ And then, out of nowhere, this guy with a nightstick..."
"Whoa, whoa, settle down. Easy, cowboy."
by Nick D December 19, 2003
 
16.
pair of kings in poker
he went all in with pocket cowboys
by mike March 23, 2004
 
17.
(noun) 1. a man, or sometimes a boy, who tends or herds beef cattle or works on a beef ranch; COWMAN; COWHAND 2. Americanism, Colloquial any man or boy who wears the typical garb like that of a cowboy Sense 1 as in play or fashion 3. American slang a male person regarded as simple, rustic, idealistic, uneducated, crude, unsophisticated, wild, and/or reckless, also, a man who is a reckless car or truck driver 4. Americanism any male character in western pictures or novels who acts or dresses like a cowboys as a gunslinger, sheriff, train robbers, etc. in the old American west 5. American slang something regarded as western in culture as a book or film as “I have fifteen war films and fifty cowboys in my video collection.”
(adj) 1. like, of, or pertaining to cowboys and/or American western culture as a cowboy hat, a cowboy gun, or a cowboy movie 2. American slang shoddy, ad hoc or inferior in workmanship or quality as cowboy coffee or cowboy wiring
(vi) to do the work of cowboys; tend or herd beef cattle
-cowboy up American slang be a man; act as a genuine male; face a difficult challenge or task at hand
The cowboys rode sunup until sundown with grit teeth!!
by Jon64Bailey January 13, 2009
 
18.
a reckless and independent person, usually a male(especially a reckless driver)
Some cowboy drove right in my way. He almost got me into a car crash.
by Light Joker January 20, 2005
 
19.
This is when a guy sits on top of a keg with the tap in between his legs and rocks back and forth with the nozzle in his mouth chugging. with his free hand twirling around above his head as if he has a lasso
Dude keg stands and gargoyles are good but I'm doin a cowboy
by mike o. June 22, 2009
 
20.
Verb. To get away with minor theft of a commonly valued item or resource by taking advantage of another person's ignorance.
1) I was fed up with Ryan always using my margorine, so I decided to cowboy the weed that he left busted up on the table after he passed out last night.

2) He never counts how many beers are in the fridge, you should just cowboy one.
by Mr.Correct1985 May 25, 2009
 
21.
According to Nicole "Snooki" Polizzi from MTV hit series "Jersey Shore" a cowboy is a hot guy who's not Italian.
You can't marry a cowboy but you could go for a ride on one.
by Niki Tuezday! September 05, 2010