A hot-tempered person gets angry easily. A small thing — a late bus, a joke that lands wrong — can light them up. Temper here means a person's usual way of getting angry, not how hot the weather is. It is a common, slightly unkind description; families, teachers, and stories all use it. Though actually, hot-tempered is about a short fuse, not about being passionate in love; that is closer to hot-blooded. Someone can be hot-tempered at home and perfectly polite at work.

脾氣暴躁；容易生氣的。