This appears to be a solid list of cowboy slang.
A few more beauties on this site.
Turns out that the PBR is actually owned by the athletes themselves. Pretty kickass.
Of course, the Wikipedia does not disappoint in its knowledge of the sport of bullriding.
In case there will be any sidebetting, here is a link to the season standings on the PBR tour. I must say, I am disappointed that only two of these guys have double initials in lieu of a first name.