keep/lose your temper

keep (one's) temper

To refrain from becoming angered, enraged, or upset due to some provocation; to maintain control of one's composure despite being angry or upset. You're a good driver, but if you don't do a better job of keeping your temper when other drivers make mistakes, you're going to end up causing a crash some day. It's hard to keep my temper with the kids after being kept awake by them all night long.
See also: keep, temper

lose (one's) temper

To become angered, enraged, or upset due to some provocation; to have an outburst upon losing one's patience. I'm usually a pretty calm person, but whenever I start driving, I find I lose my temper at the slightest inconvenience. When we were kids, my dad lost his temper a lot, but he's mellowed out since then.
See also: lose, temper

keep/lose your ˈtemper (with somebody)

manage/fail to control your anger: You must learn to keep your temper.He loses his temper very quickly if you argue with him.
See also: keep, lose, temper