whimsy
noun /ˈwɪmzi/
/ˈwɪmzi/
[uncountable]- a way of thinking or behaving or a style of doing something that is unusual and not serious, in a way that is either funny or annoying
怪念头;古怪可笑的举动;吊儿郎当;随心所欲 词源early 17th cent. (in the sense ‘caprice’): probably based on whim-wham, a whim.