I found an interesting website, with a page devoted to "Cowboy Terms" - I had no idea what "sunfishing" was, and found this website while looking it up.
Any cowboy-related word that you don't know should be researched at this page on cowboyfrank.net
I made a copy, not for anyone to use, but to preserve in case the website ever ceases to exist - if the link ever becomes broken, someone please let me know, and I'll put the copy up; until then, it isn't mine to present.