Slang Restless or impatient; fidgety: The long wait made the children antsy.
Slang Nervous; apprehensive: "Camps got shot up all the time, but if there wasn't a shoot-up, they'd get antsy” ( Harper's).
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.