be beside yourself idiom
C2 （因情绪太强烈而）无法控制自己
If you are beside yourself with a particular feeling or emotion, it is so strong that it makes you almost out of control.
He was beside himself with grief when she died. 她死时他悲痛欲绝。
Synonyms: angry (EMOTIONAL)apoplecticcross furious (ANGRY)incandescent (QUALITY)incensediratelivid (ANGRY)mad (ANGRY) seething (angry)sore (ANGRY) wrathful