Characterized by undue haste and lack of thought or deliberation. Synonyms:brainish, impetuous, impulsive, madcap, tearaway."Liable to such impulsive acts as hugging strangers" , "An impetuous display of spending and gambling" , "Madcap escapades"
... Courtenay (now in Italy where he died soon after); France was to help. A number of the conspirators were taken and put to death after protracted examination; others escaped to France, including a Dudley, a connexion of the dead Northumberland, who gave his name to the plot. Most of them were hotheaded young men, who did not appreciate, as did their shrewder elders, the danger of relying on French assistance which would only be granted for ulterior ends. As the year went on, the violent temper of Paul IV. involved him in war with Philip; France naturally took up ... — England Under the Tudors • Arthur D. Innes