have ants in your pants

have ants in the/(one's) pants

1. To be unable to sit still, due to anxiety, excess energy, or impatience. 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."
2. To be interested in or in pursuit of sexual activity. You've been single for a while now—don't you have ants in the pants yet?
See also: ant, have, pant
Farlex Dictionary of Idioms.

have ants in your pants

INFORMAL
If someone has ants in their pants, they cannot keep still. They all had ants in their pants, incapable of sitting in their seats for more than six minutes at a stretch.
See also: ant, have, pant
Collins COBUILD Idioms Dictionary, 3rd ed.

have ants in your pants

be fidgety or restless. informal
See also: ant, have, pant
Farlex Partner Idioms Dictionary

have ants in your pants

(informal) be unable to stay still because you are anxious or excited about something: Relax and enjoy yourself — you’ve really got ants in your pants about something tonight!
See also: ant, have, pant
Farlex Partner Idioms Dictionary
See also:
  • ants in one's pants, have
  • have ants in one’s pants
  • have ants in the/(one's) pants
  • have got ants in the/(one's) pants
  • get ants in the/(one's) pants
  • ants in one's pants
  • ants in pants
  • ants in the/(one's) pants
  • poop (one's) pants
  • by the seat of your pants