Butt.
To "tail" someone, means to follow them. A somewhat dated use of the word "tail" refers to a sex partner, or the act of sexual intercourse, often called a "piece of tail".
Cowboys loved a colorful phrase! A broom-tail was a description for a horse. This was usually not a compliment, as a horse with a long, shaggy broom-tail meant one that was wild and unruly.
Pheasant.
Cowboys loved a colorful phrase! This one means a green, inexperienced person. The image is of a horse with a shaved tail instead of the bushy one typically seen in the West.
Cowboys loved a colorful phrase! This was another description for a horse. A bangtail was similar to a broom-tail. It was a wild mustang.
If you mean slang as in internet slang, then it means "Certified Old Fart".
Cowboys loved a colorful phrase! This is a funny way of saying you've got the wrong person for anything. "I picked the wrong pig by the tail when I started a fight with him," said the cowboy.
Cowboys loved a colorful phrase! This meant wearing your best clothes. The bib is a shirt front and the tucker is the tail.
Garrett mean in cockney slang
Slang is slang It's the s' "LANG " uage.
In old slang, milkshake mean butt.
Cool itself, unless you are using it to mean mildly cold, is a slang word. Just because it is old slang doesn't mean that it is not still slang.
It is slang for having sex.