It means that the speaker is quite speechless or mocking the other party. It is a popular online word. In most cases, it means no problem and you are in a bad mood.

Girls use this time more, which generally means they are a little angry. I don't like or hate what the other person said, so I can't show it positively, but I use okfine to express it.

The source of this stalk:

OKfine's terrier comes from a girl's Weibo. The specific content is that OKflne is not so tired today, I know, because I am lazy. I don't know why, my legs are like lead, and I can't lift them. In this Weibo, the woman writes fine in OKfine as flne.

The usage of this stalk:

In English, OK and FINE are mostly used in spoken English, both of which mean good. OK is mainly to answer other people's questions. As for FINE, it means "fine" or "beautiful" and the weather is "sunny"