1) Bad-tempered 2) Bristly 3) Ill-natured 4) Prickly 5) Splenetic 6) Very irritable 1) Bristly 2) Prickly 3) Tart 
• (a.) Quick to resent a trifling affront; characterized by snappishness; irritable; irascible; petulant; snappish. • (a.) Resembling a wasp in form; having a slender waist, like a wasp.
Wasp'ish adjective 1. Resembling a wasp in form; having a slender waist, like a wasp. 2. Quick to resent a trifling affront; characterized by snappishness; irritable; irascible; petulant; snappish. « He was naturally a waspish and hot man.» Bp. Hall. «...