Or (and I realize I’m playing devil’s advocate here, but…) maybe she was being sarcastic about all of them? The fact that she referenced the outcome of the 2020 election (the number of votes Biden actually got) along with “the earth is flat” and “birds aren’t real” makes me think she doesn’t believe any of them and this is just bait.
It’s short for “expatriate.” I’m not saying it isn’t used in the way you described, but that’s not the original meaning.
https://www.merriam-webster.com/dictionary/expatriate