Yes RBF is a thing and I have it. ha ha The passage of time and gravity contribute to it for me.. There were a bunch of you tube videos about it over the last couple of years. Everyone assumes you are unhappy or annoyed or judgmental. Face reading software says it is faint contempt. Kanye West is the prototype for male RBF. Do not practice it. Don't ever let your face go there for the first time if you can avoid it. It is not a good thing.
And by the way, you don't have it. Your resting face is friendly but dignified. [emoji4]
Darn shouldn't put a smiley face. Is the an emoji for RBF?
I think I found it [emoji19]