disapproval If you refer to someone as a hothead, you are criticizing them for acting too quickly, without thinking of the consequences. someone who does things too quickly without thinking
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)