A person who is half Caucasion, half Mexican. Or any kind of Latino, really. They can look more Mexican, more Caucasion, or you just can't tell at all.
Some of my best friends are whitesican!
Half white, half mexican, a whitesican.
It's easy to confuse me with another white guy walking down the street. BUT HE IS HALF MEXICAN! WHY WOULD I LIE ABOUT BEING A BEANER?