ants in pants
*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) pantsSlang
A state of restless impatience.