What does idiom jumping off the walls mean?

The idiom "jumping off the walls" means to be extremely excited, energetic, or restless. It's often used to describe someone who is so full of energy that they seem unable to stay still.

Here are some examples of how you might use it:

* "The kids were jumping off the walls after their birthday party."

* "I was jumping off the walls with excitement when I got the job offer."

* "He's been jumping off the walls ever since he found out he won the lottery."

The image conjured by the idiom is someone literally bouncing off the walls, unable to contain their energy. This, of course, is a metaphor, but it effectively captures the feeling of being overwhelmingly excited or restless.