an area of land that has not been surveyed / Synonym of uncharted water (an unknown situation)

plural of uncharted territory

A lack of any quantifiable knowledge about some possible occurrence, as opposed to the presence of quantifiable risk.

plural of Uncle Tomahawk

(derogatory, ethnic slur) A Native American who is subservient to white authority.

(UK, education) An offer of a place at a particular university for a student, regardless of their performance in examinations, on the condition that they agree to choose that university over any other.

(Cockney rhyming slang) sick; unwell

(politics) A political dispute marked by incivility but minimal violence.

(baseball) A curveball.

(derogatory) A servile attitude adopted by black people toward white authority.