1. 异想天开：whimperer 抱怨者 | whimsicality 异想天开 | whimsy 奇想

2. 心情浮动：whimsical 心情浮动的 | whimsicality 心情浮动 | whimsy 心情浮动

3. 奇特行为：whimsicalhumorous 诙 | whimsicality 奇特行为 | whimsicality 心情浮动

4. 心情浮动/奇异/奇特行为：whimsical /古怪的/诙/ | whimsicality /心情浮动/奇异/奇特行为/ | whimsy /怪念头/

noun

1. the trait of behaving like an imp

    Synonym: impishnessmischievousnesspuckishness

2. the trait of acting unpredictably and more from whim or caprice than from reason or judgment

    e.g. I despair at the flightiness and whimsicality of my memory

    Synonym: flightinessarbitrarinesswhimsywhimseycapriciousness