What is "twitchiness"

Usage examples of "twitchiness".

I thought: this shared tedium, this twitchiness, and those little powdery runnels forming to the sides of the nose.

As the three of us walked in, Mary Megan was pacing back and forth in little shuffling steps like a robot, the budding twitchiness I'd noticed the previous night now blossoming into whole-body convulsions and tongue-flappings and slappings and--as if in mockery of Hannah's own eyes---eye-rolls up and down and around and even seemingly over, like egg yolks frantic to escape beating.