MayBC
A Chinese or Asian person who is more Americanized than a FOB (Fresh of the boat), but not quite as Americanized as an ABC (American Born Chinese) so this person is inbetween the two, a "MayBC" and has been in the United States for several years and speaks English fairly well, and has become somewhat Americanized.
Person A: "Is your new Asian girlfriend a FOB?" Person B: "No man she's been here like ten years, she's a MayBC..."