A gay man, especially one who enjoys the sport of anal rimming.
Usage of this word is especially prevalent in the Canadian central flatlands where cornfields are especially abundant and sometimes associated with the Gay Community
The sheriff had seen enough, and started to smack the cowpuncher around and ask him how he liked it. What kind of a coward beats the shit out of livestock?
Yea that guy went and jumped the fence and got in there and started slugging the cows, trying to get them to tip over. I think he was one of them cowpunchers.