The term "evolutionist" is commonly used as an anti-science label by moronic proponents of pseudosciences, creationism and intelligent design, sometimes the word changes to 'evilution' to indicate that belief in evolution is, in some creationist opinions, evil and of the devil. Both "evolutionist" and "evolutionism" refer to scientists and others who accept that the evidence-based theory of evolution is the best explanation for the development of life on the earth (otherwise known as over 99% of all scientists in relevant fields). Often, the term just gets thrown around to refer to anyone else they're disagreeing with at the time, such as atheists or liberals. Some creationists even argue that "evolutionism" is a secular religion to compound this stupidity.