Somebody who is rash, impetuous or impulsive.(noun)
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Use "hotspur" in a sentence
"Every dictionary worth its spurs notes that the word hotspur was the sobriquet of Sir Henry Percy, son of the Earl of Northumberland, killed in 1403 in the rebellion against Henry IV."
"It seemed the gravest danger a hotspur faced these days—and not a slight one, to be sure—was from one of his fellows in a mood to take offense."
"Well anyhow my hero was desperate dan. just in front of Wilson in the hotspur I think - but of course this was long before your friends decided to attack humanity and give you a cause to follow"