她真是个急性子.
你的老板是个性急的人吗?
That weather is very hot, Chiri hothead.
那天天气很热,赤日炎炎。
"short-tempered person," 1650s, from hot in the figurative sense + head (n.); Johnson's dictionary also lists hotmouthed "headstrong, ungovernable;" Elizabethan English had hot-brain "hothead" (c. 1600); and Old English had hatheort "anger, rage," literally "hot heart."