Japanese term for "half-Japanese" -- a person with one parent who is Japanese and one non-Japanese. From the English word "half". The term is common and considered non-offensive by Japanese, though resisted by some haafus themselves, often in preference to "mix". When used in English, often used as an adjective rather than a noun, i.e., "he is haafu" rather than "he is a haafu".
Did you know she's haafu?
Really? Uso! zenzen shiranakatta!