不脛而走 bù jìng ér zǒu

DEFINITIONS

  1. to get round fast
  2. to spread like wildfire

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
脛 jìng shinbone; calf of leg
而 ér
HSK 3
and; and then; and yet; but
走 zǒu
HSK 2
walk, go on foot; run; leave