A horse is a "hay burner".
Cowboys loved a colorful phrase! This was what a cowboy called corned beef. The insinuation was that it was as tough as horse meat.
Cowboys loved a colorful phrase! This was another term for spurs. You dug into your horse with them.
Cowboys loved a colorful phrase! This means thrown from your horse. You landed in the grass.
Cowboys loved a colorful phrase! This one means to cost. A cowboy might say "That horse stands me in a hundred dollars."
Cowboys loved a colorful phrase! These were spurs. You used them to hook your horse's gut.
Cowboys loved a colorful phrase! This was an adjective. It meant "very" or "exceedingly." A cowboy might say "That's a thundering good horse."
Cowboys loved a colorful phrase! This one means to go away. The image is of a cowboy slinging his bedroll onto his horse and leaving.
Cowboys loved a colorful phrase! This meant to beat or trounce soundly. The image is of a horse lathered with sweat.
Cowboys loved a colorful phrase! This one means a wild or spirited horse. You can see the image of the horse sniffing and snuffling to figure out what's going on.
Cowboys loved a colorful phrase! This meant lively, brisk, holding up your head. A good horse was perk.
Cowboys loved a colorful phrase! This meant exhausted. A played out horse shouldn't be ridden until it's rested.