It means that you aren't going to accomplish anything but you can still dream about getting it done.
Dark Horse is an older synonym for underdog, also used sometimes in elections. A dark horse is someone unlikely to win in a competition.
alive
Cowboys loved a colorful phrase! This meant lively, brisk, holding up your head. A good horse was perk.
Nothing. The phrase is "man about the house" not "horse".
The phrase 'horses at pasture' simply means that they are out in a grassy area (such as a paddock) eating grass or feeding. Sometimes it may also mean a horse is retired in a paddock. :)
Usually this phrase means somebody is in over their head and about to be foreclosed on. Sometimes it may be a case of a loved one having died and the other person just wanting to go somewhere else.
The phrase "give her head" is slang for performing oral sex on a woman.
It doesn't actually mean anything, it is just a marking.
Cowboys loved a colorful phrase! This was a horse-riding phrase. It meant to ride a horse until it was overheated. The image is of your horse in an oven baking because you rode it too long or too fast.
A horse in a race that is going to win. It is undoubted the horse will win. The horse cannot lose. It is a done deal. Nothing can prevent this event happening.
The phrase about horses is actually, "That is a horse of a different color," not feather. The feather animal phrase is, "That is a bird of a different feather." The horse of a different color was in the movie, "The Wizard of Oz:" and the phrase means some kind of unrelated or incidentally related matter with a distinctly different significance.
The meaning of this phrase is that not everything has another meaning. Sometimes things are just how they are.