nbd
(also NBD)
小事一桩，没什么大不了（no big deal 的缩写，多用于社交媒体或手机短信等）
written abbreviation for no big deal : used, for example on social media and in text messages, to say that something is not important
We can talk about it later, nbd. 我们之后可以谈一谈，小事一桩。