Script (guión): Idioms, ‘ants in your pants’. If you have ants in your pants you are excited or agitated about something, and you can't sit still. You may have noticed people sitting on a bus or in a doctor's surgery and they can't stop wriggling their legs around, and just fidgeting all over the place. I would say to them, ‘What's wrong? Have you got ants in your pants?’