The slang term for a cowboy is "HICK"
Not cowboy slang. Overalls are another name for work pants.
posse
Trout ropin
OK is a slang word, and cowboys used it.
tough hombre
"Awesome!" or "Fantabulous" or "Sweet."
Cowboys loved a colorful phrase! This meant a cowboy's bedroll. It hinted that a cowboy would have fleas.
All tied up
Cowboys loved a colorful phrase! This is cowboy grammar for "might be able to." "I may can come to the social," said the cowboy.
A horse is a "hay burner".
'Cracklings' are the remains of a fire or cinders.
Grub, primarily.