Fresh off the boat (or "F.O.B.") is a phrase used to describe immigrants that have arrived from a foreign nation and have not yet assimilated to the host nation's culture, language, and behavior. It can also be used to describe the stereotypical behavior of new immigrants as, for example, their poor driving skills.

In the sociology of ethnicity, this term can be seen as an indicator of a nature of diasporic communities, or communities that have left their country of origin and have migrated, usually permanently, to another country. The term also has been adapted by immigrants themselves or others in their community who instead see the differentiation as a source of pride, where they have retained their culture and have not lost it to assimilation.