ants in pants

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."
See also: ant, pant
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

*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.
See also: ant, pant
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

ants in (one's) pants

Slang
A state of restless impatience.
See also: ant, pant
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also: