Mestizo is synonymous with mixed race.
However, I like to take it from the Filipino context. For that let’s have a look at history…
Back in March 1521 a Purtugese explorer Ferdinand Magellan under and crew were the first Europeans to arrive to the Philippines archipelago. This led to the Philippines becoming a Spanish colony on the 27th April 1565. Magellan completed the most difficult part of his voyage then he was killed in a campaign against a native king at Mactan Island in the Philippines in 1521. The Filo’s stopped him good!
BOOM! The original Filipino Mestizo was born, a person part Spanish and Filipino.
The old school Mestizo is often is referred to a person of mixed Spanish blood and that of which ever country they were trying to colonise in the 1500’s.
Nowadays modern day Filipino mestizos include Filipinos of Spanish or Mexican origin, American or British mestizos, as well as Chinese mestizos, Japanese mestizos and others. And of course we can’t forget about the ultimate Filipino Australian!!! 
Johnny Mestizo
I like your blog, it seems so positive and you have a great smile. We have some mestizo information that’s out of the ordinary for you on or site, k take care.
I like your name Johnny Mestizo, it’s like a super hero =0) and you look like you could be one cause you’re so buff, hehe