irascible (adj.)

• bearish
• bitchy
• cantankerous
• churlish
• contrary
• crabbed
• cranky
• cross
• cross-grained
• crusty
• cussed
• difficult
• disagreeable
• edgy
• emotional
• eruptive
• excitable
• explosive
• feisty
• fractious
• froward
• high-spirited
• high-strung
• huffish
• huffy
• inflammable
• irritable
• mean
• mettlesome
• nervous
• ornery
• perturbable
• perverse
• prickly
• sensitive
• skittish
• snappish
• spiteful
• splenetic
• stuffy
• sulky
• sullen
• testy
• touchy
• ugly
• volcanic
• waspish
• wayward
• wrongheaded