quick-tempered (adj.)

• abrupt
• bad-tempered
• choleric
• churlish
• excitable
• hot-blooded
• hot-tempered
• ill-tempered
• impatient
• impulsive
• irascible
• irritable
• quarrelsome
• short
• short-tempered
• snappish
• splenetic
• temperamental
• testy
• touchy
• volatile
• waspish