Characterized by jerky or spasmodic motion: the twitchy whiskers of a cat. (adjective)
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.
Use "twitchy" in a sentence
"The new design puts you in the cockpit sooner and the ground combat is more "twitchy"- meshing with the space system."
"But "better" is a subjective term, and the so-called twitchy fingered kids who play Call of Duty make up a HUGE chunk of the player base, and therefore are responsible for contributing to the massive amount of units sold."
"My voice isn't all that bad, but I was kind of twitchy and stuttery, especially in a situation when I was on the air live, working without a script."