In this thread it's thrown around as if everyone is referring to something specific related to immigration.
Edit:// checked US news. I can see what you all refer to now. To explain media seems to assume the US is having a "brain drain" because of fleeing scientists, some other countries make fun of it and call it their "brain gain"
In New Zealand the brain drain discussion has been going on for decades. We are remote, have a limited economy, wages are low. As a result, many smart kids graduate from university, go travel overseas (particularly Australia and the UK), find jobs with better wages, and never come home. It's referred to in the media as the brain drain.
Edit:// checked US news. I can see what you all refer to now. To explain media seems to assume the US is having a "brain drain" because of fleeing scientists, some other countries make fun of it and call it their "brain gain"