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1. mixed
A person of more than one racial background; usually looks quite distinctive from monoracial people

see also eurasian blasian biracial hapa etc.
real-life examples are everywhere, just look around.
by BlasianSensation Oct 23, 2004 add a video
2. Mixed
When referring to an individual, a mixed person is someone who was born with two or more ethnicities.
I am mixed with Irish and Welsh.

We are a diverse school. This year's prom queen was mixed with Nigerian and Armenian.
3. Hienz 57
Hienz 57 is a slang word (not actually a slur) for someone who is of many different ethnic groups.
Me I am part Mexican, Spanish, Italian, Irish and Japanese.
Or Tiger Woods who is every race White, Black, Asian, and American Indian. We would both be called Hienz 57.
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