xùn​léi​bù​jí​yǎn'ěr

at lightning speed

Senses

迅雷不及掩耳 xùn​léi​bù​jí​yǎn'ěr at lightning speed

meaning literally that a sudden clap of thunder occurs before one has time to cover one's ears; describes an action or event that happens so quickly that there is no time to prepare for it

References

synonym 疾雷不及掩耳/疾雷不及掩耳 迅雷不及掩耳/迅雷不及掩耳