lose one's temper 脾气暴躁；发脾气;生气;电闪雷鸣;发火;动怒

【例句】 　
He is so laid-back. I've never seen him lose his temper. 　　
他总是不慌不忙地。我从没见他发过脾气。

These children behaved so badly, it's no wonder that their parents lost their temper.
这些孩子太捣乱了，怪不得他们的父母发脾气。