心猿意马

xīn yuán yì mǎ

lit. heart like a frisky monkey, mind like a cantering horse (idiom); fig. capricious (derog.)

to have ants in one's pants; hyperactive; adventurous and uncontrollable

心

xīn

heart

猿

yuán

variant of 猿[yuan2]

意

yì

idea

马

mǎ

abbr. for Malaysia 馬來西亞|马来西亚[Ma3 lai2 xi1 ya4]