A relatively recent term/word which is simply an alternative spelling/pronunciation of the word supremacist. According to a few online dictionaries the words have essentially the same meaning and are simply variations of a word which means "someone who believes in the ultimate authority or supremacy of one race, nationality, gender, orientation, etc. It's use probably stems from a difficulty or lack of motivation in pronouncing the word supremacist.
People who think only Caucasians should be the only race to get full rights and privelages of being a US citizen may be labeled as a white supremist.
by Adolf Allerbush August 28, 2016