snappish

Likely to snap or bite, as a dog.

Irritable and curt.

Ready or apt to snap or bite.

Sharp in reply; apt to speak angrily or tartly; tart; crabbed; also, proceeding from a sharp temper or from anger; also, chiding; scolding; faultfinding.

Synonyms Touchy, testy, crusty, petulant, pettish, splenetic.