The common term, yes. But the legal definition of expat is:
2) Expatriate The term “expatriate” means— (A) any United States citizen who relinquishes his citizenship, and (B) any long-term resident of the United States who ceases to be a lawful permanent resident of the United States (within the meaning of section 7701(b)(6) ).
2) Expatriate The term “expatriate” means— (A) any United States citizen who relinquishes his citizenship, and (B) any long-term resident of the United States who ceases to be a lawful permanent resident of the United States (within the meaning of section 7701(b)(6) ).