the quality of being easily annoyed and complaining in a rude way like a child

I have never witnessed such a display of childish petulance. 我从未见过如此幼稚的任性行为。

Displaying a mixture of petulance and arrogance, he refuses to listen to objections. 他的行为既暴躁又傲慢，拒绝听取反对意见。