have got ants in the/(one's) pants
have got ants in the/(one's) pants
To be unable to sit still, due to anxiety, excess energy, or impatience. The kids really have got 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 got ants in her pants."