Very angry and upset. The image is being so agitated that only by being physically restrained, as if in a straitjacket, would a person be prevented from doing something rash and regrettable.
Nothing. You have left out part of the idiom. Perhaps you mean "your hands are tied," which means that you have no power to do anything in a given situation.
This is not an idiom - it means exactly what it says. You should stay fit and healthy.
It's usually just TIED UP -- it means you're busy.
I think it means that that person agrees with that others persons idiom and that it fit that question that the teacher or whoever asked that question.
To tie the knot means to get married. The image is of two people tied together.
It means to go out into the world and experience life on your own without being tied to your mother's apron strings.
That's not an idiom. It means just what it looks like -- something is fit for you to eat.
Fit to Be Tied - album - was created in 1980.
The phrase "fit to be tied" means being extremely angered or upset about a situation. It comes from the literal meaning of being so upset that one feels like they need to be physically restrained or tied down to control their emotions.
This could be one of several phrases. "Tied the knot" means that you got married. The image is to be tied together. If your stomach is "tied in a knot," it is cramping and painful. If a rope is tied in a knot, it has a place where the ends of the rope cross each other and pull tight."Tied the knot" means to get married. For example, "Mary and Ted tied the knot yesterday" means that Ted and Mary got married.
blow a gasket, blow a fuse : pushed past some tolerance level into an angry fit.
The cast of Fit to Be Tied - 1988 includes: Peta Singer