A Caucasian person that does not display a stereotypical Caucasian appearance or behavior, that is usually associated with Northern Europeans and WASPs, due to ethnic and cultural differences.
These groups of people typically have ancestry hailing from Eastern Europe or the Mediterranean. Irish people may also sometimes be referred to as "off-white", due to their past persecution.
Off-White(s):
"I'm Chinese and German. What about you?"
"I'm Italian, Czech, Greek, Polish etc. You know, all of the Off-Whites."