That's an interesting use (I've had friends use it too) but not necessarily by definition. Websters has two versions. The first has two definitions: (1)(Vb) ba

That's an interesting use (I've had friends use it too) but not necessarily by definition. Websters has two versions. The first has two definitions: (1)(Vb) banish; exile (2) (vb) to withdraw oneself from residence in or allegiance to one's native country. They indicate that it can be a noun, but without further definition. Note the implication that it's not voluntary, or at least under duress (a la Snowden), and not necessarily with the intent of returning. Second version is an adjective, meaning "living in a foreign land."