ants in the/(one's) pants
Said of one who is unable to sit still, due to anxiety, excess energy, or impatience. The phrase is typically used with the verb "have." The kids really have ants in the pants today, so I'm going to take them to the playground. A: "Why is Carrie pacing?" B: "She's waiting for her doctor to call, so she's had ants in her pants all day."
*ants in one's pants
Fig. nervousness and agitation, (on the image of someone suffering great discomfort as if having actual ants in the pants. *Typically: get ~; have ~; give one ~.) I always get ants in my pants before a test. I wonder if all acton get ants in their pants before they go onstage.
ants in (one's) pants
Slang A state of restless impatience.