不知轻重 bù zhī qīng zhòng

DEFINITIONS

  1. lit. not knowing what's important (idiom); no appreciation of the gravity of things
  2. naive
  3. doesn't know who's who
  4. no sense of priorities

CHARACTERS

不 bù no, not; un-; negative prefix
知 zhī know, perceive, comprehend
轻 qīng light; easy, simple; gentle
重 zhòng heavy, weighty; double