不翼而飞

HSK 7-9

búyì'érfēi

disappear without a trace; vanish into thin air

to vanish all of a sudden; to spread fast; to spread like wildfire

钱不翼而飞

qián bù yì ér fēi

Money vanished without a trace

信息不翼而飞

xìnxi bù yì ér fēi

Information spread rapidly and unexplainedly