腹黑兮兮
[fù hēi xī xī]
'腹黑兮兮' roughly translates to 'scheming and smirking'. '腹黑' means 'underhandedness' (literally belly-black in traditional culture), which describes a clever manipulator with hidden intentions; '兮兮' implies laughing in a somewhat mocking way. It characterizes people playing smart tricks on others while pretending innocence.