tetchy

1. ADJ If you say that someone is tetchy, you mean they are bad-tempered and likely to get angry suddenly without an obvious reason. 坏脾气的; 暴躁的[英国英语] [非正式]

You always get tetchy when you're hungry. 你一饿的时候脾气就不好。

He was in a particularly tetchy mood yesterday. 昨天他脾气特别不好。