adj 1: quickly aroused to anger; "a hotheaded commander" [syn: choleric, irascible, hot-tempered, quick-tempered, short, short-tempered]
2: characterized by undue haste and lack of thought or
deliberation; "a hotheaded decision"; "liable to such
impulsive acts as hugging strangers"; "an impetuous
display of spending and gambling"; "madcap escapades";
(`brainish' is archaic) [syn: impulsive, impetuous, madcap, tearaway(a), brainish]