lose one's temper

It’s easy to lose one’s temper in this situation, so the counsellor has instructed the friends and family members to organize their thoughts on paper.

Though it was wrong to hate a brother in the faith, or even to lose one’s temper, it was a duty to loathe and to curse the alien and wicked people that was dominated by the Spirit of Darkness We shall later, when we come to the other scrolls, return to this feature of the literature of the sect.

A few minutes later, Stafford addressed the court, again thanking Eulian for his apology and saying she knows what it feels like to lose one's temper.

"It is important with the Iranians not to lose one's temper or show that one is upset," a leaked State Department cable quoted Geoffrey Adams, then UK ambassador to Iran, as advising U.S. officials in November 2007.

One doesn't lose one's temper, one gets annoyed!