N-COUNT 发脾气;耍性子 If a child has a tantrum, they lose their temper in a noisy and uncontrolled way. If you say that an adult is throwing a tantrum, you are criticizing them for losing their temper and acting in a childish way. 发脾气;耍性子 [disapproval]
My son had a tantrum and banged his fist on the ground.
我儿子大发脾气,一拳捶在了地上。
He immediately threw a tantrum, screaming and stomping up and down like a child.