英语脾气暴躁怎么说

To describe someone as having a short temper or being prone to outbursts of anger in English, you could say that they are "quick to anger" or "easily agitated." You could also say that they have a "short fuse" or that they are "hot-headed." Here are some example sentences using these phrases:
She has a short fuse and gets angry at the slightest provocation.
He's quick to anger and can be very volatile when he's upset.
She can be easily agitated and prone to outbursts of anger.
He has a hot-headed temperament and can be difficult to reason with when he's angry.