A whim; an affected air. Thackeray. [1913 Webster]
A display of ill-humor, especially a demonstration of rage or frustration by shouting or violent physical movements, such as the stamping of feet; called also temper tantrum. It is usually associated with children, but is sometimes seen in adults. [PJC]
A display of anger expressed by irrationally striking out at innocent targets or inanimate objects; as, the governor was so insulted by the article, he threw a temper tantrum and cancelled the ceremony. [PJC]