Aggravated complaint. Irked. Demonstratively angry. Fit refers to an angry outburst, often with childish brats. Also used as “Throw a fit”.  (Compare to Riled-up, Fit to be tied, Hissy fit, Mad as a hornet or  Set one’s teeth on edge.) {see 50 Levels of Anger video}

“Don’t have a fit just because you can’t drive my car.”