unforbearing

abrupt agog antsy anxious appetent ardent athirst avid breathless brusque chafing choleric curt demanding dying to eager edgy feverish fretful hasty having short fuse headlong hot under collar hot-tempered impetuous indignant intolerant irascible irritable itchy keen on pins and needles quick-tempered racing one's motor restless ripe snappy straining sudden testy thirsty unindulgent vehement violent