"Keep up the work" really isn't a common idiom, so I don't have another idiom that means the same. Sometimes you hear "keep up the good work," which means to continue doing a good job, to keep on with the quality you're doing now. However, I still can't think of another idiomatic expression that means the same thing...
to support
Hang in there!
-to release the pressure or tension on something. e.g. You're gonna slack up on that rope, u tied the girl with, right now!
It means tired of, frustrated with, and starting to get angry.
it means you are not as fast as somebody else
This is not an idiom. It means exactiy what it says - "advanced" means moved up or moved along, so the person is older.
It means that you can be easily be woken up by any small sound.
"Zippity split" is an idiomatic expression meaning "hurry up," "right away," or "very quickly."
Burned up means that a person is totally exhausted. A person can also be burned up if they are very angry with someone.
"Keep up the good work" means to continue doing well and maintain a high standard of performance or behavior. It is an encouraging phrase used to motivate someone to persevere and maintain their positive momentum.
"Zip your lips" is an idiomatic expression that means to stay quiet or not to speak. It is often used when someone wants another person to stop talking or to keep a secret.
Yes - it means left in a hurry. When a horse starts running, it tosses its tail up in the air, which is why you say "high-tail."