adj. 1. same as hot-headed. Syn. -- choleric, irascible, hot-headed, hot-tempered, quick-tempered, short-tempered. [ WordNet 1.5 ]
2. liable to act with undue haste and without consideration. Syn. -- brainish, impulsive, impetuous, madcap, tearaway(prenominal). [ WordNet 1.5 ]