In the old days, when cowboys went to town, there were unspoken rules about proper behavior. For one thing, it was considered bad form to stand in front of a saloon and wave at a friend on horseback because it might spook the horse. Instead, simply raise your chin upwards in acknowledgement. The rider will undoubtably do the same. Enough said.
The Cowboy Chin Wave
This is Wyatt Earp's saloon in Alaska. Notice how all the men are wearing hats? Don't even touch them. I mean it. Don't be a horse's ass (see at left).
"Walk It Off, Peckerwood."
I played music in honkytonks for several decades and often a bartender, or a bouncer, would tell an angry, tipsy cowboy to "walk it off." It wasn't a request, it was a command. I have a hunch the same thing was true in the Old West.